Early Earth was bombarded by series of city-sized asteroids

Scientists know that the Earth was bombarded by huge impactors in distant time, but a new analysis suggests that the number of these impacts may have been 10 times higher than previously thought. This translates into a barrage ...

Darkling beetles have natural lubricant in 'knee' joints

A team of researchers from the University of Kiel in Germany and Aarhus University in Denmark, has found that darkling beetles create a type of lubricant in their legs to prevent their leg joints from wearing away. They describe ...

Continuous activity of small earthquakes makes mountains grow

From a human perspective, earthquakes are natural disasters—in the past hundred years, they have caused more than 200,000 deaths and enormous economic damage. Mega-earthquakes with a magnitude of nine or higher on the Richter ...

Cities 'must become car-free to survive'

Cities must become fully car-free in order to be liveable in the future, according to the UCL experts behind a new modeling report looking at urban car use.

Subduction initiation may depend on a tectonic plate's history

Subduction zones are cornerstone components of plate tectonics, with one plate sliding beneath another back into Earth's mantle. But the very beginning of this process—subduction initiation—remains somewhat mysterious ...

'Pack ice' tectonics reveal Venus' geological secrets

A new analysis of Venus' surface shows evidence of tectonic motion in the form of crustal blocks that have jostled against each other like broken chunks of pack ice. The movement of these blocks could indicate that Venus ...

Extreme greenhouse effect heated up the young Earth

Very high atmospheric CO2 levels can explain the high temperatures on the still young Earth three to four billion years ago. At the time, our Sun shone with only 70 to 80 percent of its present intensity. Nevertheless, the ...

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