There could be a lot more potentially habitable planets out there than previously thought, and some of them could be very nearby.
We can all be picky at times, but you probably think of this planet as reasonably bearable. In a new model for what constitutes a habitable zone, however, the Earth barely scrapes over the bar.
Erratic changes in the East African climate around two million years ago may have been the driving force behind human evolution, say researchers at Penn State and Rutgers University.
A device that sorts cells using acoustic waves could lead to the creation of miniature medical analytic devices that fit in a pocket.
Americans hate tailored political advertising - so much so that it's likely to put them off politicians they already support.
Despite being separate species, polar bears and brown bears interbred during periods of global warming in the past - and appear to be doing the same today.
A Penn State engineer believes autonomous, self-replicating exobots will ultimately be tasked with exploring the universe.
What would happen if you jumped into a lake and then, still wet, went swimming in the ocean?
The Fermi paradox asks why, if intelligent life is common, no technological civilizations have ever been observed.
A couple of grains of salt could be all that's needed to help bacteria produce hydrogen from wastewater or organic byproducts.
High school biology teachers need more training to, um, help them understand and thus believe in basic tenets of biology.