When did freshwater appear on Earth?
Geologists found chemical ratios in ancient minerals that suggested Earth had freshwater 550 million years after it formed.
The Encyclopedia of Science's Frontier
Geologists found chemical ratios in ancient minerals that suggested Earth had freshwater 550 million years after it formed.
Scientists stimulated atmospheric gases with electricity and found they reacted with common salts and minerals to form complex chemicals…
In an effort to find out if breastfeeding was related to eating behaviors during childhood, researchers studied a group of children for 6…