Oxygen fills the air today, but for most of Earth’s early history it barely existed. Scientists say the atmosphere did not hold steady oxygen until about 2.

A bizarre fossil called Prototaxites, which was the largest life-form on land 400 million years ago, may have been a ...

"Our results show that it's not enough." Officials issue warning after observing 'concerning' change in tiny creature: 'New ...

Life runs on instructions you never see. Every cell reads DNA, turns that message into RNA, and then builds proteins that ...

For almost two decades, scientists have debated whether sponges or comb jellies are the first animal lineage. Now some are ...

A machine learning model incorporating functional assessments predicts one-year mortality in older patients with HF and improves risk stratification beyond established scores. Functional status at ...

Summer bulbs go into their gardens after the most pronounced chill of winter but before the end of winter to bloom for next ...