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biofuels: beyond ethanol - kqed quest
Bookmarked 790 weeks ago for years there039s been buzz -- both positive and negative -- about generating ethanol fuel from corn but thanks to recent developments the bay area is rapidly becoming a world center for the next generation of green fuel alternatives meet the scientists investigating the newest methods for converting what we grow into what makes us go |
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what happens when you put a hummingbird in a wind tunnel deep look
Bookmarked 597 weeks ago scientists have used a high-speed camera to film hummingbirds039 aerial acrobatics at 1000 frames per second they can see frame by frame how neither wind nor rain stop these tiniest of birds from fueling updeep look: a new ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe and meet extraordinary new friends explore big scientific mysteries by going incredibly smallhow do hummingbirds eatwith spring in full bloom hummingbirds can be spotted flitting from flower to flower and lapping up the sugary nectar inside these tiniest of birds have the highest metabolism of any warm-blooded animal requiring them to consume their own body weight in nectar each day to surviveby comparison if a 150-pound human had the metabolism of a hummingbird he or she would need to consume the caloric equivalent of more than 300 hamburgers a daybut it039s not just an extreme appetite that sets hummingbirds apart from other birds these avian acrobats are the only birds that can fly sideways backwards and hover for long stretches of time in fact hovering is essential to hummingbirds survival since they have to keep their long thin beaks as steady as a surgeons scalpel while probing flowers for nectarhow do hummingbirds flyhummingbirds dont just hover to feed when the weather is nice they have to keep hovering and feeding even if its windy or raining a remarkable feat considering most of these birds weigh less than a nickelmore great deep look episodes:newt sex: buff males writhing females cannibalismhttps:wwwyoutubecomwatchv=5m37qr_4xnypygmy seahorses: masters of camouflagehttps:wwwyoutubecomwatchv=q3ctgoqz3wwbanana slugs: secret of the slimehttps:youtubemhvcqsganjg--see also another great video from the pbs digital studioswhere do birds go in winter - it039s okay to be smarthttps:wwwyoutubecomwatchv=ds2xfvsqzbgread the extended article on how hummingbirds hover at kqed science:http:blogskqedorgscience20150331what-happens-when-you-put-a-hummingbird-in-a-wind-tunnelsubscribe: http:googl8nwxqtkqed science: http:kqedorgsciencesupport of kqed science is provided by hopelab the david b gold foundation s d bechtel jr foundation the dirk and charlene kabcenell foundation the vadasz family foundation smart family foundation and the members of kqed deep look is also supported by pbs digital studios |
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a real alien invasion is coming to a palm tree near you deep look
Bookmarked 481 weeks ago the south american palm weevil is bursting onto the scene in california its arrival could put one of the states most cherished botanical icons at risk of oblivion deep look is a ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe and meet extraordinary new friends explore big scientific mysteries by going incredibly small new videos every other tuesday summer means vacation time and nothing says welcome to paradise quite like a palm tree though its home to only one native species california has nonetheless adopted the palm as a quintessential iconbut a new snake in californias palm tree-lined garden may soon put all that to the test dozens of palms in san diegos sweetwater summit regional park about 10 miles from the mexican border are looking more like sad upside-down umbrellas than the usual bursts of botanical |
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whack jab crack it039s a blackback land crab smackdown deep look
Bookmarked 409 weeks ago it039s an all-out brawl for prime beach real estate these caribbean crabs will tear each other limb from limb to get the best burrow luckily they molt and regrow lost legs in a matter of weeks and live to fight another dayyou can learn more about curiositystream at https:curiositystreamcomdeeplookhelp deep look grow by supporting us on patreon https:wwwpatreoncomdeeplookpbs digital studios mega-playlist:https:wwwyoutubecomplaylistlist=pl1mtdjdvoooqkjv9wnrixrphdssm4gu0jdeep look is a ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world explore big scientific mysteries by going incredibly smallon the sand-dune beaches where they live male blackback land crabs do constant battle over territory the stakes are high: if one of these baby-faced crabs secures a winning spot he can invite a mate into his den six or seven feet beneath the surfacewith all this roughhousing |
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for these tiny spiders it039s sing or get served deep look
Bookmarked 517 weeks ago male jumping spiders perform courtship dances that would make bob fosse proud but if they bomb they can wind up somebody039s dinner instead of their mate subscribe to deep look http:googl8nwxqtdeep look is a ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe and meet extraordinary new friends explore big scientific mysteries by going incredibly small new videos every other tuesday during courtship the male jumping spider performs an exuberant dance to get the females attention like a pint-sized magic mike working for twenties he shimmies from side to side waves his legs and flaps his front appendages called pedipalps in her directionif she likes what she sees the female may allow him to mate but things can also go terribly wrong for these eight-legged suitors she might decide to attack him or even eat him for lunch |
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essential ppin: egg-ceptional
Bookmarked 732 weeks ago soft and creamy mollet eggs florentine make a perfect and easy breakfast or lunch that jacques shares with his best friend jean-claude in the program039s open he continues with an egg theme featuring eggs in ramekins eggs en cocotte and scrambled eggs in bread cases with candied oyster mushrooms finally he demonstrates how to make various omelets: a classic fines herbs omelet an american mushroom omelet and a flat potato omelet |
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stinging scorpion vs pain-defying mouse
Bookmarked 548 weeks ago there039s a chemical arms race going on in the sonoran desert between a highly venomous scorpion and a particularly ferocious mouse the outcome of their battle may one day change the way doctors treat pain in peoplesubscribe to deep look http:googl8nwxqtdeep look: a new ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe and meet extraordinary new friends explore big scientific mysteries by going incredibly smallcommonly found in the sonoran desert the arizona bark scorpion centruroides sculpturatus is the most dangerous scorpion in the continental united states according to keith boesen director of the arizona poison amp drug information center about 15000 americans report being stung by scorpions every year in the us the worst stings about 200 annually are attributed to this one species its sting can cause sharp pain along with tingling swelling numbness dizziness shortness of breath muscular convulsions involuntary eye movements coughing and vomiting children under two years old are especially vulnerable since 2000 three human deaths have been attributed to the arizona bark scorpion in the united states all within arizonabut there is one unlikely creature that appears unimpressed while it may not look the part the southern grasshopper mouse onychomys torridus is an extremely capable hunter it fearlessly stalks and devours any beetles or grasshoppers that have the misfortune to cross its path but this mouse has a particular taste for scorpionsthe scorpion venom contains neurotoxins that target sodium and potassium ion channels proteins embedded within the surface of the nerve and muscle cells that play an important role in regulating the sensation of pain activating these channels sends signals down the nerves to the brain thats what causes the excruciating pain that human victims have described as the feeling like getting jabbed with a hot needle others compare the pain to an electric shock but the grasshopper mouse has an entirely different reaction when stungwithin the mouse a special protein in one of the sodium ion channels binds to the scorpions neurotoxin once bound the neurotoxin is unable to activate the sodium ion channel and send the pain signal instead it has the entirely opposite effect it shuts down the channel keeping it from sending any signals which has a numbing effect for the mouse--- how many species of scorpion are therethere are almost 2000 scorpion species but only 30 or 40 have strong enough poison to kill a person --- are scorpions insectsscorpions are members of the class arachnida and are closely related to spiders mites and ticks --- where do arizona bark scorpions live commonly found in the sonoran desert the arizona bark scorpion centruroides sculpturatus is the most dangerous scorpion in the continental united states the arizona bark scorpions preference for hanging to the underside of objects makes dangerous encounters with humans more likelyread the entire article on kqed science: http:ww2kqedorgscience20160308stinging-scorpion-vs-pain-defying-mousefor more information: michigan state university venom evolution: http:venomevolutionzoologymsueduinstitute for biodiversity science and sustainability at the california academy of sciences: https:wwwcalacademyorgpressrelemore great deep look episodes:what happens when you zap coral with the world039s most powerful x-ray laserhttps:youtubeaxmcu6iynsathese 039resurrection plants039 spring back to life in secondshttps:youtubeeofgklzmo2gsee some great videos and documentaries from the pbs digital studiosit039s okay to be smart: your salad is trying to kill youhttps:youtube8ofgj2kdbfkit039s okay to be smart: the oldest living things in the worldhttps:youtubejgspuydwnzqfor more content from your local pbs and npr affiliate:kqed science: http:wwwkqedorgsciencetumblr: http:kqedsciencetumblrcomtwitter: https:wwwtwittercomkqedsciencefunding for deep look is provided in part by pbs digital studios and the john s and james l knight foundation deep look is a project of kqed science which is supported by hopelab the david b gold foundation s d bechtel jr foundation the dirk and charlene kabcenell foundation the vadasz family foundation smart family foundation and the members of kqed |
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these giant leaf insects will sway your heart deep look
Bookmarked 361 weeks ago giant malaysian leaf insects stay still very still on their host plants to avoid hungry predators but as they grow up they can039t get lazy with their camouflage they change and even dance to blend in with the ever-shifting foliagesubscribe to deep look http:googl8nwxqtplease support us on patreon https:wwwpatreoncomdeeplookdeep look is a ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world explore big scientific mysteries by going incredibly small---youll have to look closely to spot a giant malaysian leaf insect when its nibbling on the leaves of a guava or mango tree these herbivores blend in seamlessly with their surroundings because they look exactly like their favorite food: fruit leavesbut you can definitely see these fascinating creatures at thecalifornia academy of sciences located in the heart of san francisco039s golden gate park through the sp |
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daddy longlegs risk life and especially limb to survive deep look
Bookmarked 472 weeks ago when predators attack daddy longlegs deliberately release their limbs to escape they can drop up to three and still get by just finesubscribe to deep look http:googl8nwxqtdeep look: a new ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe and meet extraordinary new friends explore big scientific mysteries by going incredibly smallwe all know its not nice to pull the legs off of bugsdaddy longlegs dont wait for that to happen these arachnids related to spiders drop them deliberately a gentle pinch is enough to trigger an internal system that discharges the leg whether it hurts is up for debate but most scientists think not given the automatic nature of the defense mechanismits called autotomy the voluntary release of a body part two of their appendages have evolved into feelers which leaves the other six legs for lo |
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these lizards have been playing rock-paper-scissors for 15 million years
Bookmarked 538 weeks ago male side-blotched lizards have more than one way to get the girl orange males are bullies yellows are sneaks blues team up with a buddy to protect their territories who wins it depends - on a genetic game of roshambo subscribe to deep look http:googl8nwxqtdeep look is a ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe explore big scientific mysteries by going incredibly small new videos every other tuesday every spring keen-eyed biologists carrying fishing poles search the rolling hills near los banos about two hours south of san francisco but theyre not looking for fish theyre catching rock-paper-scissors lizardsthe research team collects western side-blotched lizards which come in different shades of blue orange and yellow barry sinervo a professor of ecology and evolutionary biology at uc santa cruz leads th |
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winter is coming for these argentine ant invaders deep look
Bookmarked 540 weeks ago argentine ants are spreading across the globe eliminating local ants with their take-no-prisoners tactics: invade dismember repeat but this ruthless killer seems to have met its match in the winter ant a california native with a formidable secret weapon subscribe to deep look http:googl8nwxqtdeep look is a ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe explore big scientific mysteries by going incredibly small new videos every other tuesday --- about argentine ants and winter antsfor about 200 years the argentine ant expansion story has been the slow-moving train wreck of myrmecology the study of ants wherever they go argentine ants eliminate the competition with a take-no-prisoners approach invade dismember consume repeat the basic wisdom among ant scientists is that if you see argentines its already too late |
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where are the ants carrying all those leaves deep look
Bookmarked 543 weeks ago ants dont eat leaves they use them to grow white tufts of nutritious fungus to feed their offspring their success as farmers has made leafcutter ants into fungus tycoons complete with their own underground cities and huge half-inch soldiers to patrol themdeep look: a new ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe and meet extraordinary new friends explore big scientific mysteries by going incredibly smallwhat do ants eatthough leafcutter ants drink the sap in leaves for energy they dont eat them instead they use them to grow something else leafcutters use leaf pieces to feed a fungus that grows in white tufts in their nests the ants eat the fungus and feed it to their broodhow old are ants to give you an idea while humans have farmed for around 12000 years ants have been doing it for 60 million how many ants are there in the worldif you bundled together all the ants in the world there would be more of them than people theyre the dominant biomass says brian fisher chair of the department of entomology at the california academy of sciences in san francisco this is because all 30000 species of ants are social they have many ways of making a livinghow strong are antsleafcutter ants haul leaf pieces through fields or forests to their underground nests for a human this feat would be the equivalent of carrying more than 600 pounds between our teeth why are ants important to the soilthe activity of ants aerates the soil making it easier for water and oxygen to get through they also contribute organic mattermore great deep look episodes:what happens when you put a hummingbird in a wind tunnelhttps:wwwyoutubecomwatchv=jyqy64ovjfynewt sex: buff males writhing females cannibalismhttps:wwwyoutubecomwatchv=5m37qr_4xnypygmy seahorses: masters of camouflage https:wwwyoutubecomwatchv=q3ctgoqz3wwsee also another great video from the pbs digital studiosit039s okay to be smart: what039s the most successful species on earthhttps:wwwyoutubecomwatchv=fwc46ncnldoand this one is also a favorite:how to get ants to carry a sign - smarter every day 92https:wwwyoutubecomwatchv=-zzzcw9ifdqread an extended article on how leafcutter ants grow a fungus from leaf pieces:http:ww2kqedorgscience20150611where-are-the-ants-carrying-all-those-leavesif youre in the san francisco bay area you can see live leafcutters at the oakland zoo or the california academy of sciences in san franciscohttp:wwwoaklandzooorghttp:wwwcalacademyorgthe compact book the leafcutter ants: civilization by instinct by bert hlldobler and edward o wilson has detailed black and white drawings photos and a fascinating description of the mating habits of leafcutter ant queens the queen accumulates all the sperm shell need for her entire reproductive life during a single mating frenzy after that males are no longer necessary: leafcutter colonies are made up entirely of female antskqed science: http:ww2kqedorgsciencetumblr: http:kqedsciencetumblrcomtwitter: https:wwwtwittercomkqedsciencefunding for deep look is provided in part by pbs digital studios and the john s and james l knight foundation deep look is a project of kqed science which is supported by hopelab the david b gold foundation s d bechtel jr foundation the dirk and charlene kabcenell foundation the vadasz family foundation smart family foundation and the members of kqed |
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halloween special: watch flesh-eating beetles strip bodies to the bone deep look
Bookmarked 569 weeks ago our first halloween special dermestid beetles are fast and fastidious eaters they can pick a carcass clean in just days leaving even the most delicate bone structures intact this makes them the perfect tool for museum scientists-- if you keep them far far away from valuable collectionssubscribe: http:googl8nwxqtin nature dermestid beetles are death-homing devices theyll find a dead body about a week after death and lay eggs in the drying flesh the larvae emerge with a voracious appetite outgrowing their skins six to eight times in just days before pupating becoming adults and flying away to start a new colonythese dermestid beetles at the museum of vertebrate zoology at uc berkeley are direct descendants from the original colony established in this museum in 1924 the process now used at museums around the world was pioneered here these are the beetles you see here in this flesh-eating beetles time lapsescientists in the prep lab downstairs receive nearly a thousand carcasses a year its their job to preserve each animal for long-term use in the collections upstairs and the work is not for the squeamishwhat makes beetles ideal for cleaning museum specimens is that theyre fast and fastidious eaters they can pick a carcass clean while leaving even the most delicate bone structures intactit takes a large beetle colony 24 48 hours to clean the bones of small animals like rabbits and owls and they can work on 100 - 200 specimens at a time larger animals like deer or coyotes take about a week but the alliance between beetles and museum is an uneasy one downstairs the beetles are a critical tool but if dermestids got loose upstairs they could wreak havoc in the library stacks munching through specimen drawers and ruining entire collections--- more kqed science:tumblr: http:kqedsciencetumblrcomtwitter: https:wwwtwittercomkqedsciencekqed science: http:ww2kqedorgscience---more great deep look episodes:where are the ants carrying all those leaveshttps:wwwyoutubecomwatchv=-6okj5fgk24what happens when you put a hummingbird in a wind tunnelhttps:wwwyoutubecomwatchv=jyqy64ovjfypygmy seahorses: masters of camouflagehttps:wwwyoutubecomwatchv=q3ctgoqz3wwrelated videos from the pbs digital studios network--- more kqed science:tumblr: http:kqedsciencetumblrcomtwitter: https:wwwtwittercomkqedsciencekqed science: http:ww2kqedorgsciencefunding for deep look is provided in part by pbs digital studios and the john s and james l knight foundation deep look is a project of kqed science which is supported by hopelab the david b gold foundation s d bechtel jr foundation the dirk and charlene kabcenell foundation the vadasz family foundation smart family foundation and the members of kqed |
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why jellyfish float like a butterflyand sting like a bee deep look
Bookmarked 569 weeks ago jellyfish dont have a heart or blood or even a brain theyve survived five mass extinctions and you can find them in every ocean from pole to pole whats their secret keeping it simple but with a few dangerous tricksdeep look: a new ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world get a new perspective on our place in the universe and meet extraordinary new friends explore big scientific mysteries by going incredibly small--- why do jellyfish stingjellyfish sting to paralyze their prey they use special cells called nematocysts jellyfish dont have a brain or a central nervous system to control these stinging cells so each one has its own trip wire called a cnidocilwhen triggered the nematocyst cells act like a combination of fishing hook and hypodermic needle they fire a barb into the flesh of the jellyfishs prey at 10000 times the force of gravity making it one of the fastest mechanisms in the animal kingdom as the barb latches on a thread-like filament bathed in toxin erupts from the barb and delivers the poisonthe nematocyst only works if the barb can penetrate the skin which is why some jellies are more dangerous to humans than others the smooth-looking tentacles of a sea anemone a close relative of jellies that also has nematocyst cells feel like sandpaper to the touch their nematocysts are firing but the barbs arent powerful enough to puncture your skin--- read the article for this video on kqed science:https:ww2kqedorgscience20150929why-jellyfish-float-like-a-butterfly-and-sting-like-a-bee--- more great deep look episodes:pygmy seahorses: masters of camouflagehttps:wwwyoutubecomwatchv=q3ctgoqz3wwyou039re not hallucinating that039s just squid skin https:wwwyoutubecomwatchv=0wtlrlikvjethe fantastic fur of sea ottershttps:wwwyoutubecomwatchv=zxqg_um1txi--- related videos from the pbs digital studios networki don039t think you039re ready for these jellies - its okay to be smarthttps:wwwyoutubecomwatchv=a4dqqe5p5gcwhy neuroscientists love kinky sea slugs - gross sciencehttps:wwwyoutubecomwatchv=qghiywjjhhywhat physics teachers get wrong about tides space timehttps:wwwyoutubecomwatchv=pwchk4s99i4--- more kqed science:tumblr: http:kqedsciencetumblrcomtwitter: https:wwwtwittercomkqedsciencekqed science: http:ww2kqedorgsciencefunding for deep look is provided in part by pbs digital studios and the john s and james l knight foundation deep look is a project of kqed science which is supported by hopelab the david b gold foundation s d bechtel jr foundation the dirk and charlene kabcenell foundation the vadasz family foundation smart family foundation and the members of kqed |
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this millipede and beetle have a toxic relationship deep look
Bookmarked 385 weeks ago this millipede uses deadly cyanide gas to keep predators at bay but one beetle can tolerate the toxic defense and rides the millipede like a bucking bronco who will win this showdown in the forest subscribe to deep look http:googl8nwxqtplease support us on patreon https:wwwpatreoncomdeeplookdeep look is a ultra-hd 4k short video series created by kqed san francisco and presented by pbs digital studios see the unseen at the very edge of our visible world explore big scientific mysteries by going incredibly small---across northern california as the rainy season is ending and spring is taking hold bees are buzzing flowers are growing and hikers are hitting the trailsbut down at ground level the pastoral scenery is concealing a surprising battle: relentless chemical warfare between bugsmore than 200 species of millipedes emerge from their underground lairs every year during the winter and early spring months to forage for food and seek matesthey have to fend off insects m |
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