Sinopsis
Leading science journalists provide a daily minute commentary on some of the most interesting developments in the world of science. For a full-length, weekly podcast you can subscribe to Science Talk: The Podcast of Scientific American . To view all of our archived podcasts please go to www.scientificamerican.com/podcast
Episodios
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Sick Vampire Bats Restrict Grooming to Close Family
25/03/2020 Duración: 02minWhen vampire bats feel sick, they still engage in prosocial acts such as sharing food with nonrelatives. But they cut back on grooming anyone other than their closest kin.
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Exponential Infection Increases Are Deadly Serious
24/03/2020 Duración: 05minListen in as I use two calculators to track the difference in numbers of infections over a short period of time, depending on how many people each infected individual infects on average.
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Swamp Wallaby Reproduction Give Tribbles a Run
21/03/2020 Duración: 03minThey’re not born pregnant like tribbles, but swamp wallabies routinely get pregnant while pregnant.
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Ocean Plastic Smells Great to Sea Turtles
19/03/2020 Duración: 02minOcean plastic gets covered with algae and other marine organisms, making it smell delicious to sea turtles—with potentially deadly results.
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Ancient Clam Shell Reveals Shorter Day Length
17/03/2020 Duración: 03minThe growth layers in a 70-million-year-old clam shell indicate that a year back then had more than 370 days, with each day being only about 23.5 hours.
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Snapping Shrimp Make More Noise in Warmer Oceans
11/03/2020 Duración: 02minAs oceans heat up, the ubiquitous noise of snapping shrimp should increase, posing issues for other species and human seagoing ventures.
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Stress from Undersea Noise Interferes with Crab Camouflage
10/03/2020 Duración: 02minIn an example of how sea noise can harm species, exposed shore crabs changed camouflaging color sluggishly and were slower to flee from simulated predators.
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Indigenous Amazonians Managed Valuable Plant Life
04/03/2020 Duración: 02minStudies on very old vegetation in the Amazon basin show active management hundreds of years ago on species such as Brazil nut and cocoa trees.
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Computers Confirm Beethoven's Influence
03/03/2020 Duración: 02minBy breaking 900 classical piano compositions into musical chunks, researchers could track Ludwig van Beethoven’s influence on the composers who followed him. Christopher Intagliata reports.
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Science News Briefs from around the World
02/03/2020 Duración: 03minHere are a few brief reports about science and technology from around the world, including one from off the California coast about the first heart rate measurement done on a blue whale.
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Jet Altitude Changes Cut Climate-Changing Contrails
25/02/2020 Duración: 03minIncreasing or decreasing the altitude of aircraft by a few thousand feet to avoid thin layers of humidity could make a major reduction to contrails’ contribution to climate change.
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Thoroughbred Horses Are Increasingly Inbred
24/02/2020 Duración: 02minInbreeding in Thoroughbreds has increased significantly in the past 45 years, with the greatest rise occurring in the past 15 or so of them.
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Pablo Escobar's Hippos Could Endanger Colombian Ecology
20/02/2020 Duración: 04minHippos that escaped from drug kingpin Pablo Escobar’s private zoo are reproducing in the wild. And with increasing numbers, they could threaten ecosystems.
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Wasp Nests Help Date Aboriginal Art
19/02/2020 Duración: 04minArt created by Australian Aboriginal people used organic carbon-free pigments, but wasp nests above or below the art can be used for radiocarbon dating that supplies boundaries for the age of artworks.
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Industrial Revolution Pollution Found in Himalayan Glacier
18/02/2020 Duración: 03minIce cores from a Tibetan glacier reveal the first deposits of industrial revolution pollution, starting in layers dated to about 1780.
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Fight-or-Flight Nerves Make Mice Go Gray
15/02/2020 Duración: 03minA new study in mice concludes stress can cause gray hair—and credits overactive nerves with the change in hue. Karen Hopkin reports.
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Espresso May Be Better when Ground Coarser
13/02/2020 Duración: 04minA very fine grind can actually hamper espresso brewing, because particles may clump more than larger particles will.
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Feral Dogs Respond to Human Hand Cues
11/02/2020 Duración: 04minMost feral dogs that did not run away from humans were able to respond to hand cues about the location of food—even without training.
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Neandertals Tooled Around with Clams
07/02/2020 Duración: 03minNeandertals ate clams and then modified the hard shells into tools for cutting and scraping.
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Fingering Fake Whiskeys with Isotopes
06/02/2020 Duración: 03minWhiskeys claimed to be from the 19th century are revealed to be made with much more recently grown barley, thanks to the unique isotopic fingerprint of the nuclear-testing era.