News tagged with northern hemisphere

Asteroid Vesta's mysterious olivine

(Phys.org) —Just when scientists thought they had a tidy theory for how the giant asteroid Vesta formed, a new paper from NASA's Dawn mission suggests the history is more complicated.

Nov 07, 2013
4.9 / 5 (13) 21 | with audio podcast

Say goodbye to cool summers: climate study

By 2050, the coolest summers in the tropics and parts of the northern hemisphere will still be hotter than the most scorching summers since the mid-20th century if global warming continues apace, according ...

Jun 10, 2011
3.3 / 5 (19) 43

Is the ozone layer on the road to recovery?

(Phys.org)—Satellites show that the recent ozone hole over Antarctica was the smallest seen in the past decade. Long-term observations also reveal that Earth's ozone has been strengthening following international ...

Feb 10, 2013
4.4 / 5 (14) 8 | with audio podcast

The two faces of Mars

A moon-sized celestial object that crashed into the south pole: ETH researchers use a simulation to demonstrate why Mars consists of two notably different hemispheres.

Jan 28, 2015
4.4 / 5 (14) 2

Loss of planetary tilt could doom alien life

Although winter now grips much of the Northern Hemisphere, those who dislike the cold weather can rest assured that warmer months shall return. This familiar pattern of spring, summer, fall and winter does ...

Jan 12, 2012
4.1 / 5 (14) 16 | with audio podcast

When the Sahara turned to sand

The Sahara wasn't always a desert. Trees and grasslands dominated the landscape from roughly 10,000 years ago to 5,000 years ago. Then, abruptly, the climate changed, and north Africa began to dry out.

Nov 11, 2013
4.5 / 5 (13) 4