This e-learning app brings new meaning to interactive learning.

"Cloaking" or invisibility technology is a kind of scientific Holy Grail; but actually concealing objects in direct light is notoriously difficult. A team of researchers has now found a way to achieve potential perfect invisibility by bending light—but only in "diffusive" atmospheres.

If the Trump administration is serious about peace, they will quickly realize that moving the U.S. embassy to Jerusalem will make it impossible, says journalist Daoud Kuttab.

There's a last-ditch effort by the energy industry to halt a transition from fossil fuels to energy efficiency and renewables, and it's reflected in Trump's picks to head the EPA and Department of