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Trail etiquette all hikers should follow
Don't get stuck in an infinite loop of "I insist—after you."
This pattern changes as it gets closer to your face
Try holding the shapes steady. You can't!
Why does space look so dark?
Stars may twinkle up above, but the rest is as dark as can be. Or is it?
What animal do you see in this image of a nebula?
It's a classic example of pareidolia.
These six photos were snapped by satellites. Can you figure out where?
From famous river deltas to breathtaking canyons.
How one of the most remote places in the world hosts some of the most incredible science
Antarctica is cold and desolate—and that’s why it’s so appealing to researchers.
UFO sightings say more about us than about aliens
A handful of researchers have spent years gathering data on UFOs, and their findings tell us a lot about human habits.
Four stargazing gadgets to try even when it’s raining
From simple star stickers to an advanced AR app, our list appeals to any luminary.
Six futuristic body hacks that exist right now
And what they might do next.
How do you build a tent that dangles a thousand feet up off a cliff?
Climbers trust their lives to Kolin Powick’s well-engineered products.