News
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Paleontology
Tyrannosaurs lived in the Southern Hemisphere, too
Australian fossils suggest the kin of T. rex dispersed globally 110 million years ago.
By Sid Perkins -
Chemistry
Building a cheaper catalyst
Using perovskite instead of platinum in catalytic converters could shave many hundreds of dollars off the cost of a diesel car.
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Humans
Ancient DNA suggests new hominid line
Genetic data unveil a previously unknown Stone Age ancestor in central Asia.
By Bruce Bower -
Earth
Bacteria show new route to making oxygen
New discovery adds to the few known biological pathways for making and metabolically using the gas.
By Sid Perkins -
Chemistry
Better sleuthing through chemistry
New fingerprinting method can pinpoint where, when or how a chemical warfare agent came to be.
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Physics
You really can freeze hot water faster than cold*
Experiments suggest that impurities in the warmer water may explain the “Mpemba effect” in which warm water freezes faster than cold water.
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Health & Medicine
UV radiation, not vitamin D, might limit multiple sclerosis symptoms
The rarity of MS in the tropics may be due to higher ultraviolet light exposure, not necessarily increased vitamin production, new research suggests.
By Nathan Seppa -
Life
Hawaiian caterpillars are first known amphibious insects
Developing underwater or above, it’s all good for moths that evolved new lifestyle in the islands
By Susan Milius -
Anthropology
Ancient footprints yield oldest signs of upright gait
Human ancestors may have been walking with an efficient, extended-leg technique by 3.6 million years ago.
By Bruce Bower -
Health & Medicine
Ingredient of dark roasted coffees may make them easier on the tummy
A compound generated in the roasting process appears to reduce acid production in the stomach.
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Space
Cosmic telephoto lens shows intense, early star formation
A recently discovered galaxy gives a detailed view of stellar birth in the young universe.
By Ron Cowen -
Life
There are rules in fiddler crab fight club
Territorial crustaceans will defend their own rivals, but only to keep stronger ones out.
By Susan Milius