Today, 21 percent of the air we breathe is made up of molecular oxygen. But this gas was not always in such ample, life-sustaining supply, and in fact was largely absent from the atmosphere for the first 2 billion years of ...
Earth Sciences
May 16, 2016
0
1359
The moon was formed by a violent, head-on collision between the early Earth and a "planetary embryo" called Theia approximately 100 million years after the Earth formed, UCLA geochemists and colleagues report.
Space Exploration
Jan 28, 2016
61
3667
Does assembling a mega-continent necessarily lead to a mega-monsoon? Can you tell by looking at seashells?
Earth Sciences
Sep 29, 2015
0
11
Photosynthesis leaves behind a unique calling card, a chemical signature that is spelled out with stable oxygen isotopes, according to a new study in Science. The findings suggest that similar isotopic signatures could exist ...
Earth Sciences
Apr 23, 2015
0
1254
A new analysis of a Martian rock that meteorite hunters plucked from an Antarctic ice field 30 years ago this month reveals a record of the planet's climate billions of years ago, back when water likely washed across its ...
Space Exploration
Dec 22, 2014
1
0
(Phys.org) —Geologists are letting the air out of a nagging mystery about the development of animal life on Earth.
Earth Sciences
Oct 31, 2014
97
1
The ocean is often depicted as teeming with life, from crustaceans and fish to whales and other mammals, but in fact large swaths of it are virtual deserts, populated only by bacteria and a handful of particularly hardy species.
Earth Sciences
Oct 2, 2014
0
0
A new series of measurements of oxygen isotopes provides increasing evidence that the Moon formed from the collision of the Earth with another large, planet-sized astronomical body, around 4.5 billion years ago. This work ...
Space Exploration
Jun 5, 2014
11
1
(Phys.org) —Sorting through oxygen isotopes in muddy sediment at the bottom of 10 Pacific Northwest lakes has led a research team including University of Pittsburgh scientists to conclude that droughts in that region match ...
Earth Sciences
Apr 18, 2014
0
0
.jpg)
An international team of scientists has discovered new relationships between deep-sea temperature and ice-volume changes to provide crucial new information about how the ice ages came about.
Earth Sciences
Apr 16, 2014
0
0
