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A growing number of U.S. children are being diagnosed with attention-deficit/hyperactivity disorder.

In one year’s time, the Trump administration went from acknowledging the struggles of intersex people to pretending they don’t exist.

Biologists now think there is a larger spectrum than just binary female and male

Ê×Ò³| Â鶹´«Ã½Ó³»­ 310 million years ago in what's now Arizona, a primitive creature trundled along on all fours through towering sand dunes that spilled into the sea. Normally, this creature's tracks would have vanished like other footfalls on a beach. But in a rare case, the tracks hardened into sandstone—preserving this flash of ancient behavior.

Some 310 million years ago, a reptile-like creature with an unusual gait roamed the sandy expanses of the Grand Canyon, leaving a trail of 28 footprints that can still be seen today. As Michael Greshko reports for National Geographic, these unusually well-preserved markers represent the national park’s oldest footfalls—and, if additional analysis links the early reptile to one that left a similar set of prints in Scotland roughly 299 million years ago, the tracks may even earn the distinction of being the oldest of their kind by more than 10 million years.

UNLV Police Services have two K9s who are trained to sniff out potential explosives.

After a student was attacked on campus on Sunday, we're looking at ways students can protect themselves while attending classes at UNLV.

Hundreds of UNLV engineering students have a chance to launch their careers with a job fair featuring 90 companies Thursday.

Activists in Taiwan are planning a series of mass protest rallies in the coming weeks, as opposition towards President Tsai Ing-wen builds over fears that her government will back down from plans to legalise same-sex marriage.