Science
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![[:es]Cannibalistic tadpoles and matricidal worms point to a powerful new helper for evolution[:]](https://katedra.eus/app/uploads/2018/11/Cs-cannibalizing-metamorph_300_1280x720.jpg)
[:es]Cannibalistic tadpoles and matricidal worms point to a powerful new helper for evolution[:]
Growing up in South Texas, David Pfennig was fascinated by cannibalistic tadpoles. When summer storms soak the normally dry plains, spadefoot toads emerge from their burrows to lay eggs in […]
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![[:es]‘Landmark study’ shows brain cells revamp their DNA, perhaps sparking Alzheimer’s disease[:]](https://katedra.eus/app/uploads/2018/11/SS2116497-1280x720.jpg)
[:es]‘Landmark study’ shows brain cells revamp their DNA, perhaps sparking Alzheimer’s disease[:]
Unlike most cells in our bodies, the neurons in our brain can scramble their genes, scientists have discovered. This genome tampering may expand the brain’s protein repertoire, but it may […]
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![[:es]Some of Earth’s first animals—including a mysterious, alien-looking creature—are spilling out of Canadian rocks[:]](https://katedra.eus/app/uploads/2018/11/ma_1123_Cambrian_mothership_700px.jpg)
[:es]Some of Earth’s first animals—including a mysterious, alien-looking creature—are spilling out of Canadian rocks[:]
During the Cambrian, which began about 540 million years ago, nearly all modern animal groups—as diverse as mollusks and chordates—leapt into the fossil record. Those early marine animals exhibited a […]
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![[:es]Why 536 was ‘the worst year to be alive’[:]](https://katedra.eus/app/uploads/2018/11/ca_1116NID_Dome_Tent_online_CC_cropped.jpg)
[:es]Why 536 was ‘the worst year to be alive’[:]
Ask medieval historian Michael McCormick what year was the worst to be alive, and he’s got an answer: “536.” Not 1349, when the Black Death wiped out half of Europe. […]
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![[:es]Do gut bacteria make a second home in our brains?[:]](https://katedra.eus/app/uploads/2018/11/BBB-Science-002-1280x720.jpg)
[:es]Do gut bacteria make a second home in our brains?[:]
We know the menagerie of microbes in the gut has powerful effects on our health. Could some of these same bacteria be making a home in our brains? A poster […]
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![[:es]This animal image may be the world’s oldest figurative art[:]](https://katedra.eus/app/uploads/2018/11/borneo_all_16x9.jpg)
[:es]This animal image may be the world’s oldest figurative art[:]
Daubed in orange ochre at least 40,000 years ago, images of what appear to be wild cattle on the Indonesian island of Borneo are now the oldest known figurative paintings […]
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![[:es]Frequent inbreeding may have caused skeletal abnormalities in early humans[:]](https://katedra.eus/app/uploads/2018/11/femur_16x9.jpg)
[:es]Frequent inbreeding may have caused skeletal abnormalities in early humans[:]
Early humans faced countless challenges as they fanned out of Africa: icy conditions, saber-tooth cats, and, according to a new study of ancient skeletons, an unusually high number of birth […]
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[:es]Frequent inbreeding may have caused skeletal abnormalities in early humans[:]
Early humans faced countless challenges as they fanned out of Africa: icy conditions, saber-tooth cats, and, according to a new study of ancient skeletons, an unusually high number of birth […]
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![[:es] Birth canals are different all over the world, countering a long-held evolutionary theory[:]](https://katedra.eus/app/uploads/2018/10/pelvis-comparisons_final.jpg)
[:es] Birth canals are different all over the world, countering a long-held evolutionary theory[:]
The shape of a mother’s birth canal is a tug-of-war between two opposing evolutionary forces: It needs to be wide enough to allow our big-brained babies to pass through, yet […]