Some scientists say we should be doing more to protect the Earth from asteroids. The technical issues are relatively easy, but the economics of asteroid defense are much harder.
If scientists can convince people to use the app, they hope it will help them solve a cosmic mystery. This story originally aired on March 27, 2015 on All Things Considered.
A Canadian company called Thoth Technology has patented a space elevator. The tower would rise some 12 miles into the sky, with a runway or launch pad on top.
NPR's Melissa Block talks with Kelly Beatty, senior contributing editor for Sky & Telescope, about the annual Perseid meteor shower, which reaches its peak Wednesday night.
An international team of astronomers has measured the energy produced within a large portion of space more precisely than ever before, and their work shows how the universe is slowly dying.
Farming plants in space may prove critical for future deep space travel. On Monday NASA announced it had mastered romaine lettuce. "That's awesome, tastes good," astronaut Kjell Lindgren declared.