- 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
13 May 1999 7:30 pm
The discoverer of Earth's inner core, Danish geophysicist Inge Lehman, was born on this day in 1888. After studying the shock waves from earthquakes recorded on seismographs, Lehman proposed that Earth has a smaller, solid inner core. She published this theory in 1936 under the title "P", for the three types of waves generated by Pacific temblors. Within a few years, work by others confirmed her hypothesis. Lehman later was the founder and first president of the European Seismological Federation.
[Source: Emily McMurray, Ed., Notable Twentieth Century Scientists (Gale Research Inc., ITP, 1995).]