- 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
Oldest Piece of Earth Discovered
24 February 2014 11:00 am
At 4.4 billion years old, geologists have discovered the oldest piece of Earth—a zircon crystal. The microscopic gem was found on a sheep farm in Australia and is about twice the diameter of a human hair, according to The Guardian. The finding, reported this week in Nature Geoscience, suggests that Earth’s crust formed much earlier than thought and supports the hypothesis of a “cool early Earth” that could sustain oceans and, perhaps, even life shortly after forming.
See more Signal/Noise.