A groundbreaking study suggests that the famous Cambrian explosion—the dramatic burst of diverse animal life—might have actually started millions of years earlier than we thought. By analyzing ancient ...

A new study of ancient fossil trails pushes the origins of complex life deeper into Earth’s history, before the Cambrian Period began.

Rather than a constant upward trajectory of evolution, it’s been billions of years of boom-and-bust cycles – first an explosion of life, and then a mass extinction of all but the most hardy hangers-on ...

These echinoderms (relatives of starfish and sea urchins) first appeared in the fossil record about 480 million years ago during the Ordovician Period—approximately 250 million years before dinosaurs ...

During this period, the average species extinction rate drastically increased to 71.6% per 100 kyr. This study quantitatively demonstrates the dominant role of the rate of climate change in ...

The Bennett sisters also advocated for legislators to delegate money to put period products in Title I schools. The lawmakers first set aside $200,000 for the effort and later upped it to $400,000.

You may pass bigger clots, fluid, and other tissue. The symptoms of a period may come on gradually before bleeding begins. They include bloating, appetite and mood changes, and breast tenderness.

The Marvel timeline, though, is pretty easy to follow. Agents of Shield season 3’s eleventh episode has a bit of a jump, and Civil War is dealt with from episode 20 onward.

Here's a brief timeline of key stages in the pair's relationship and Musk's involvement in Trump's orbit over the past year. Elon Musk: 'Disappointed' by the cost of Trump's tax bill, says it ...