The United States has a proud history of preserving its natural beauty through national parks. Each year, millions of ...

A new study finds that ocean acidity may have prevented life on Earth from developing for the planet’s first 500 million ...

New research suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for photosynthesis.

One might assume that marine fossils are exclusively unearthed in sedimentary coastal or underwater deposits. This is far ...