Isn't it wonderful to imagine that Earth was utterly different 400 million years ago! Before the time, when trees, oaks, and ...

Open the Youtube video It's a journey that began with a remarkable fact: the ancestors of whales crawled out onto land around 400 million years ago and entered upon a dazzling odyssey of evolution.

Perhaps two of them, one 372 million years ago and another 445 million years ago ... about one supernova happens every 400 million years within close enough vicinity to Earth that its radiation ...

One of the most important milestones in the evolution of life began some 400 million years ago, when the first animals made their way from water onto land. At that time, known as the Devonian ...

Robert Gastaldo When plants took root on dry land more than 400 million years ago, they made themselves susceptible to hungry herbivores. Over the eons, a vast variety of creatures ranging from ...

The earliest fossil evidence for sharks or their ancestors are a few scales dating to 450 million years ago, during the Late Ordovician Period. Emma Bernard, a curator of fossil fish at the Museum, ...

It lived in the shallow margins of a marine environment about 400 million years ago. A scattering of its skeletal elements was preserved in a small limestone outcrop at the southern end of the ...