The rare Tiehm's buckwheat stands less than a foot tall (30 centimeters) in Nevada's rocky high desert, its thin, leafless stems adorned with tiny yellow flowers in spring.
Ecology
Mar 7, 2020
4
26
Before the Taqba Dam impounded the Euphrates River in northern Syria in the 1970s, an archaeological site named Abu Hureyra bore witness to the moment ancient nomadic people first settled down and started cultivating crops. ...
Earth Sciences
Mar 7, 2020
31
10590
A new NASA/university study of carbon dioxide emissions for 20 major cities around the world provides the first direct, satellite-based evidence that as a city's population density increases, the carbon dioxide it emits per ...
Earth Sciences
Mar 7, 2020
0
344
Two factors that control the expression of a key gene required by luminescent bacteria to kill competing bacterial cells have been identified. The finding, by researchers at Penn State, sheds light on the molecular mechanisms ...
Cell & Microbiology
Mar 7, 2020
0
442
Extreme temperature can do strange things to metals. In severe heat, iron ceases to be magnetic. In devastating cold, lead becomes a superconductor.
General Physics
Mar 7, 2020
0
450
