Dense, hazy fog episodes characterized by relatively high humidity, low visibility and extremely high PM2.5 have been a headache to many megacities, including those in mainland China. Among pollutants that are less than 2.5 ...
Earth Sciences
Dec 27, 2019
0
131
(PhysOrg.com) -- The ground where NASA's Mars Exploration Rover Spirit became stuck last year holds evidence that water, perhaps as snow melt, trickled into the subsurface fairly recently and on a continuing basis.
Space Exploration
Oct 28, 2010
2
0
Wriggle your toes in a marsh's mucky bottom sediment and you'll probably inhale a rotten egg smell, the distinctive odor of hydrogen sulfide gas. That's the biochemical signature of sulfur-using bacteria, one of Earth's most ...
Earth Sciences
Nov 6, 2014
0
0
(PhysOrg.com) -- For decades, climate scientists have worked to identify and measure key substances -- notably greenhouse gases and aerosol particles -- that affect Earth’s climate. And they’ve been aided by ever more ...
Earth Sciences
Oct 29, 2009
0
0
Antiferromagnets are materials that lose their apparent magnetic properties when cooled down close to absolute zero temperature. Different to conventional magnets, which can be described with classical physics even at the ...
General Physics
Jun 17, 2013
1
0
Star-shaped and swallowtail-shaped tiny, dark bumps in fine-layered bright bedrock of a Martian ridge are drawing close inspection by NASA's Curiosity Mars rover.
Space Exploration
Feb 8, 2018
0
200
In Northern Chile's Atacama Desert, one of the driest places on Earth, microorganisms are able to eke out an existence by extracting water from the very rocks they colonize.
Plants & Animals
May 4, 2020
1
292
Morphogens are molecules that travel from cell to cell in order to pattern tissues in the embryo. These molecules are important not only for the embryo during development, but also for the adult during tissue repair. However, ...
Cell & Microbiology
Aug 9, 2022
0
16
(PhysOrg.com) -- A new study provides the first evidence that bacteria respond to odors, which according to one of the researchers may be the earliest evolutionary example of olfaction.
The distinctive "fecal prints" of microbes potentially provide a record of how Earth and life have co-evolved over the past 3.5 billion years as the planet's temperature, oxygen levels, and greenhouse gases have changed. ...
Cell & Microbiology
Dec 24, 2014
0
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