- News Home
17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
- About Us
28 August 1998 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).]