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Ice arenas and artificial snow now dominate the winter Olympics. Athletes there -- and everywhere -- may need to adjust how they train and perform.

Kids with math learning disabilities process number symbols differently than quantities shown as dots -- and it shows up in MRIs.

Space exploration can bring people together and reflect deep societal divisions.

Birds that feed on nectar or fruit evolved better mechanisms for managing metabolism, blood pressure and high glucose.

Seven firms reported inconsistent results on the same sample, some over multiple tests. These gut microbe discrepancies could have health consequences.

A DNA analysis suggests mosquitoes shifted from nonhuman primates to early humans nearly 2 million years ago.

Direct detection of lithium from a SpaceX rocket reentry offers new evidence that metal pollution from space debris could threaten the ozone layer.

Suitable milkweed habitat in Mexico may shift south, fracturing existing migration routes and possibly pushing some butterflies to stay put.

Tiny, repeating detachments between sole and floor -- thousands of times a second -- create the distinctive squeak heard on the court, data show.

Finding a caterpillar with rhythm was "mind-blowing," suggesting it might be a more widespread part of animal communication than thought.