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Drastic musk ox population decline 12,000 years ago due to climate, not humans, study finds

05:31 09-03-2010; source: www.sciencedaily.com

Scientists have discovered that the drastic decline in Arctic musk ox populations that began roughly 12,000 years ago was due to a warming climate rather than to human hunting. The research is the first study to use ancient musk ox DNA collected from across the animal's former geographic range to test for human impacts on musk ox populations.

Drastic musk ox population decline 12,000 years ago due to climate, not to humans

00:31 09-03-2010; source: www.sciencedaily.com

Scientists have discovered that the drastic decline in Arctic musk ox populations that began roughly 12,000 years ago was due to a warming climate rather than to human hunting. The research is the first study to use ancient musk ox DNA collected from across the animal's former geographic range to test for human impacts on musk ox populations.

Unselfish molecules may have helped give birth to the genetic material of life

22:31 08-03-2010; source: www.sciencedaily.com

One of the biggest questions facing scientists today is how life began. Scientists have discovered that small molecules could have acted as molecular midwives in helping the building blocks of life's genetic material form long chains and may have assisted in selecting the base pairs of the DNA double helix.

Monuments monitored from a distance

21:31 05-03-2010; source: www.sciencedaily.com

A team of engineers in Spain has created a system for monitoring historical monuments by remote control and detecting possible damage. Five years ago the researchers placed various sensors on the Giraldillo, the sculpture that crowns the Giralda in Seville.

Snowball Earth: New evidence hints at global glaciation 716.5 million years ago

21:31 04-03-2010; source: www.sciencedaily.com

Geologists have found evidence that sea ice extended to the equator 716.5 million years ago, bringing new precision to a snowball Earth event long suspected to have taken place around that time. The new findings -- based on an analysis of ancient tropical rocks that are now found in remote northwestern Canada -- bolster the theory that our planet has, at times in the past, been ice-covered at all latitudes.

Asteroid killed off the dinosaurs, says international scientific panel

21:31 04-03-2010; source: www.sciencedaily.com

The Cretaceous-Tertiary mass extinction, which wiped out the dinosaurs and more than half of species on Earth, was caused by an asteroid colliding with Earth and not massive volcanic activity, according to a comprehensive review of all the available evidence.