When Judith Klatt began studying the colorful mats of primitive microbes living in a sinkhole at the bottom of Lake Huron, she thought she might learn something about Earth’s early ecosystems. Instead ...

Ever since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing down, and its days have ...

More daylight helped oxygen escape from microbial mats. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Here's a new spin on how Earth became an ...