Learn how microscopic fossils reveal that tiny seafloor organisms were already feeding and recycling nutrients soon after one of Earth’s largest mass extinctions.

Public health officials warned dog owners Friday to be on alert after a dog in the San Fernando Valley was found to have raccoon roundworm eggs. Racoon roundworm is a parasite that’s commonly found in ...

Do you know what the universal blood type is? Apparently, only one in 10 Americans do. (It’s O-negative, by the way.) How ...

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