Showing posts with label Los Alamos National Laboratory. Show all posts
Showing posts with label Los Alamos National Laboratory. Show all posts
Monday, December 21, 2015
New Find on Mars Suggests 'Considerable Water Activity'
In a finding that suggests "considerable water activity" on Mars, NASA says its Curiosity rover has found very high concentrations of silica on the red planet. The agency says it also found "a mineral named tridymite, rare on Earth and never seen before on Mars."
The discoveries took place on Mount Sharp, where Curiosity drilled into a rock called "Buckskin" to find the tridymite, and where it used its "ChemCam" laser to measure high silica levels. The odd findings led researchers to take the rare step of ordering Curiosity to retrace its path to learn more.
Explanations for the high silica levels "all require considerable water activity," says Jens Frydenvang of Los Alamos National Laboratory and the University of Copenhagen. He adds, "and on Earth high silica deposits are often associated with environments that provide excellent support for microbial life." [...]
Saturday, May 30, 2015
Why Aren't The Aliens Here Already?
By Adam Frank
www.npr.org
5-27-15
The story begins like this: In 1950, a group of high-powered physicists were lunching together near the Los Alamos National Laboratory.
Among those in attendance were Edward Teller (father of the nuclear bomb) and the Nobel Prize-winning Enrico Fermi. The discussion turned to a spate of recent UFO sightings and, then, on to the possibility of seeing an object (made by aliens) move faster than light. The conversation eventually turned to other topics when, out the blue, Fermi suddenly asked: "Where is everybody?"
While he'd startled his colleagues, they all quickly understood what he was referring to: Where are all the aliens?
What Fermi realized in his burst of insight was simple: If the universe was teeming with intelligent technological civilizations, why hadn't they already made it to Earth? Indeed, why hadn't they made it everywhere?
This question, known as "Fermi's paradox," is now a staple of astrobiological/SETI thinking. . . .