How did Earth's atmosphere become oxygen-rich? What is the chemical composition of the Earth's atmosphere? It is composed of about 21 percent of it. A cyanobacterium, or blue-green algae, is ...

Nanotube bridge networks grow between the most abundant photosynthetic bacteria in the oceans, suggesting that the world is ...

The new study deciphered the single-most greatest mass extinction on Earth driven by a natural calamity that still exists.

Earth's atmosphere is 20 percent oxygen and 80 percent nitrogen from sea level to about 75 miles up, where space begins. At 18,000 feet, the atmosphere is half as dense as it is on the ground ...

Earth’s atmosphere is comprised of 21 percent oxygen. This suggests that the evolution of sophisticated technology on other ...

Learn more about how researchers are using the microbes in Yellowstone thermal pools to understand how life developed during ...

Fossils can tell scientists what living things were around at different times in Earth’s history. Evidence of early plants can tell scientists how oxygen started to be added to the atmosphere ...

This raises the possibility that life on Earth could ... for 45 percent of the ocean. Researchers will use autonomous landers equipped with advanced sensors to measure dark oxygen production ...

Scientists have made a groundbreaking discovery in the deep ocean, where oxygen is being produced by ... interplay between solar activity and Earth... The shift will take Earth back to something ...

How did Earth's atmosphere become oxygen rich? What is the chemical composition of the Earth's atmosphere? It is composed of about 21 percent of it. A cyanobacterium, or blue-green algae, is ...