News
- Earth
Carcinogens from car exhaust can linger
Free radicals similar to those in cigarette smoke may form when car exhaust cools off, and may persist indefinitely in the air.
- Space
Tiny object points to remote solar system reservoir
Possible comet may be distant visitor from the innermost region of the Oort Cloud, the proposed comet reservoir of the outermost solar system.
- Health & Medicine
Immune cells show long-term memory
Survivors of the 1918 Spanish flu pandemic still make antibodies against the virus, revealing a long-lived immunity previously thought impossible.
- Space
The great planet debate
New suggestions for defining a planet would put Pluto back on the list.
