Featured in Technology
The Hairy, Tiny Black Hole Donut Theory
If you know anything about black holes, you probably think their shape can only be spherical. But they might also be shaped like tiny doughnuts. And if that's true, we...
Rebuilding the Genius Machines
From original notes, sketchy blueprints, and blurry old photos, engineers are building the most accurate reproduction of the 1903 Wright Brothers flyer ever made. What they are learning amazes them.
Grappling with Gravity
A NASA program to produce an antigravity device: Out of the box, or totally out of bounds?
More NASA Letters
"Go Somewhere" produced a large volume of mail and vigorous online debate about the future and cost of NASA. Here are more highlights.
The PopSci Smackdown: What the eggheads are fighting about.
Is the Red Planet White or Blue? Geologists battle over water and CO2.
Scramble the Saucer!
Aerospace: Gearing up for the voyages of the starship SiMiCon.
Satellites Get a Bigger Boost
A new generation of rockets that carry satellites into orbit
If space is devoid of oxygen, how does the sun burn?
Strictly speaking, the sun does not burn. At least, not the way that, say, a wick on a candle does.
Where do the tons of “space dust” that arrive yearly come from?
Many types of space dust are floating around the universe, but the most common kind in our solar system comes from asteroid collisions and comets.
Mystique of the Small-Plane Pilot
Private-plane flying is trickier than jet flying, yet no one knows what makes a great pilot.