The upper layers in the atmospheres of gas giants—Saturn, Jupiter, Uranus and Neptune—are hot, just like Earth's. But unlike Earth, the Sun is too far from these outer planets to account for the high temperatures. Their ...
Astronomy
Apr 7, 2020
20
1569
Charlotte Pearson's eyes scanned a palm-sized chunk of ancient tree. They settled on a ring that looked "unusually light," and she made a note without giving it a second thought. Three years later, and armed with new methodology ...
Earth Sciences
Mar 30, 2020
5
1122
In Jessica Barnes' palm is an ancient, coin-sized mosaic of glass, minerals and rocks as thick as a strand of wool fiber. It is a slice of Martian meteorite, known as Northwest Africa 7034 or Black Beauty, that was formed ...
Space Exploration
Mar 30, 2020
1
356
The increased freshwater from melting Antarctic ice sheets plus increased wind has reduced the amount of oxygen in the Southern Ocean and made it more acidic and warmer, according to new research led by University of Arizona ...
Earth Sciences
Jan 6, 2020
16
637
A study involving scientists at the University of Arizona and the University of Queensland provides new insight into how the small brains of mantis shrimp—fierce predators with keen vision that are among the fastest strikers ...
Plants & Animals
Nov 25, 2019
0
245
Scientists have long been puzzled by the existence of so-called "buckyballs"—complex carbon molecules with a soccer-ball-like structure—throughout interstellar space. Now, a team of researchers from the University of ...
Astronomy
Nov 13, 2019
1
2167
Astronomers accidentally discovered the footprints of a monster galaxy in the early universe that has never been seen before. Like a cosmic Yeti, the scientific community generally regarded these galaxies as folklore, given ...
Astronomy
Oct 22, 2019
5
1154
Groundwater pumping in the last century has contributed as much as 50 percent to stream flow declines in some U.S. rivers, according to new research led by a University of Arizona hydrologist.
Environment
Jun 19, 2019
1
114
Grass-eating mammals, including armadillos as big as Volkswagens, became more diverse in South America about 6 million years ago because shifts in atmospheric circulation drove changes in climate and vegetation, according ...
Earth Sciences
Apr 29, 2019
1
255
Rain, seas and a surface of eroding organic material can be found both on Earth and on Saturn's largest moon, Titan. However, on Titan it is methane, not water, that fills the lakes with slushy raindrops.
Astronomy
Apr 29, 2019
0
718
