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New Data Support Einstein on Accelerating Universe
Galaxy measurements indicate dark energy, not flaw in relativity, to blame for cosmic repulsion
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New Evidence of Earliest Use of Fire
Scientists say they have new evidence that our ancestors were using fire as early as a million years ago....
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Bostrum: We’re Underestimating the Risk of Human Extinction
Unthinkable as it may be, humanity, every last person, could someday be wiped from the face of the Earth....
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Life’s Building Blocks Grow Close to Home
Though life is a complicated brew, some of its ingredients can be plucked from Earth’s backyard instead of being...
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Neanderthals Were Dying Out Before Humans Arrived
Neanderthals in Western Europe started disappearing long before Homo sapiens showed up, suggesting that cold weather, and not cold-hearted...
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Fossilized Raindrop Dimples Add to Mystery of Ancient Earth’s Warmth
Pumice-like cratery indents formed by ancient raindrop splats are adding to the mystery of why the adolescent Earth was...
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Ancient Human Ancestor Had Feet Like an Ape
Fossil foot hints that tree-dwellers lived alongside species built for walking.
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Can Astronauts Survive Rigors of Long Space Journeys?
As the United States considers a manned mission to Mars by the mid-2030s, ongoing research is beginning to raise...
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Geologists Correct a Rift in Africa
The Great Rift Valley of East Africa – the birthplace of the human species – may have taken much...
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Billions of Habitable Alien Planets Should Exist in Our Galaxy
There should be billions of habitable, rocky planets around the faint red stars of our Milky Way galaxy, a...