Science

No longer just a toy: Regulators say drone operators are pilots
The hottest holiday gift of the year is facing new federal regulations as drone fliers are now required to take the same safety responsibilities as airplane pilots.
Between cheap gas and carbon caps, oil sands face uncertain fate
Canada's potentially lucrative oil sands business faces serious economic challenges. It has some concerned about its future as environmental critics look for ways to keep the oil in the ground.
No warp drives, no transporters: Science fiction authors get real
Some of the biggest names in science fiction right now -- like "The Martian" author Andy Weir -- are writing what's called hard sci-fi, based on real-world science and a vision of hope for the future.
2 degrees, $100 billion: The world climate agreement, by the numbers
The historic agreement calls for "deep reductions in global emissions." But how deep will those reductions be -- and how soon, and who's paying for it?
Nearly 200 nations adopt climate agreement at COP21 talks in Paris
The deal sets the goal of limiting the world's average temperature rise to "well below 2 degrees Celsius above preindustrial levels," with an attempt to cap it at 1.5 degrees.
Climate activists demonstrate in downtown Minneapolis
Demonstrators say there's increasing awareness locally that climate change has direct repercussions on people in the state.
Hoverboards land on no-fly list, as airlines cite fire concerns
The bans come as the U.S. Consumer Product Safety Commission says it's looking into at least 10 reports of the self-balancing electric scooters bursting in flames.
Bright spots on Ceres aren't signs of alien civilizations, studies say
Two new studies of the dwarf planet might make it harder for people to imagine Ceres as a space colony or way station for an advanced race.
Earth selfie: South American summer
South America's longest day of the summer approaches just as it comes into full view.