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Animals50 years ago, scientists warned of a sparrow’s extinction
Only 17 dusky seaside sparrows remained in 1968. Today, there are none.
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AnimalsGreen blood in lizards probably evolved four times
Pigment buildups that would cause jaundice in people are normal for some New Guinea skinks.
By Susan Milius -
Particle PhysicsThe inside of a proton endures more pressure than anything else we’ve seen
For the first time, scientists used experimental data to estimate the pressure inside a proton.
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CosmologyThese stars may have been born only 250 million years after the Big Bang
Scientists find evidence that stars were forming just 250 million years after the universe was born.