News
- Earth
Sediments Sink River’s Flow into Sea
Deep-sea observations of occasional sediment-rich plumes of fresh water dumped into the ocean by rivers suggest that such underflows may be a prime conveyor of pesticides, organic carbon, and various nutrients to the seafloor.
- Health & Medicine
Cholesterol enables nerve cells to connect
Neurons form connections with each other using cholesterol supplied by other brain cells called glia.
- Earth
EPA switchback on arsenic
On Oct. 31, the Environmental Protection Agency rescinded its March decision to rescind a proposed tougher limit on arsenic in drinking water and is now planning to implement the tougher limit of 10 parts per billion in 2006.
