View through the eyepiece of a dissecting microscope showing a group of 25 N. stella foraminifera. Foraminifer are extremely abundant on Earth. Most are only about 300 microns in diameter.

A microscope image of a shelled plankton. According to research from The University of Texas at Austin, plankton populations like this flourished in the tropics during past global cooling and may ...

Between 18,000 and 11,000 years ago, the amount of carbon dioxide in the atmosphere suddenly shot up. This caused rapid ...