Why did a bunch of asteroids hit the Earth billions of years ago?
The first cells of life on Earth had a lot to contend with. Conditions were harsh and unpredictable. The air was thick with volcanic gases.…
The Encyclopedia of Science's Frontier
The first cells of life on Earth had a lot to contend with. Conditions were harsh and unpredictable. The air was thick with volcanic gases.…
A study of burned and unburned cigarettes found that water chemistry and microbes living in Mediterranean beach sediments changed after 4…