- News Home
10 April 2014 11:44 am ,
Vol. 344 ,
The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
- 10 April 2014 11:44 am , Vol. 344 , #6180
- About Us
28 August 1997 8:30 pm
Today is the birthday of Robert Strutt, an English physicist born in 1875 who discovered Earth's ozone layer. In 1916, Strutt and his colleague Alfred Fowler confirmed the existence of ozone in the atmosphere and estimated its upper limit. But Strutt didn't just have his head in the clouds--he also discovered a way to date rocks by their concentration of radioactive helium. The key was alpha radiation, the natural decay process in which an element disintegrates into a lighter nucleus and an alpha particle (or helium nucleus). In 1904, Strutt published one of the first books on radioactivity, "The Becquerel Rays and the Properties of Radium."
[Source: Emily McMurray, Ed., Notable Twentieth Century Scientists (Gale Research Inc., ITP, 1995).]