Washington, Sept 20 : Geochemists at Rensselaer Polytechnic Institute have challenged the commonly held ideas about how gases are expelled from the Earth.

The team, lead by Prof E. Bruce Watson, has found strong evidence that argon atoms are tenaciously bound in the minerals of Earth’s mantle and move through these minerals at a much slower rate than previously thought.

London, Sept 20 : Palaeontologists have discovered a treasure trove of the oldest human skeletons outside Africa, a find they say may fill crucial gaps in the story of our evolution, and help improve our understanding of the biology of the 1.8 million year old hominins.

The work, led by researchers from the Georgian National Museum in Tbilisi, describes three-dozen fossils from the skeletons of four primitive Homo erectus individuals found in recent years at Dmanisi in Georgia, central Asia.

Following the detection of cracked layers in the padding foam of all three shuttle fuel tanks, NASA said

A leading US television network selected Indian-American astronaut Sunit

With the purpose of extending future exploratory journeys into space, the first major test on the