1:15Video · Cosmic Impacts and Planetary Defense
The Asteroid That Turned Air Into a Bomb
Tunguska flattened a forest without making a crater: the atmosphere became the weapon.
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Search the universe1:15
0:50Video · Your Moving Universe
You Have Never Been in the Same Place Twice
Standing still is only a local illusion; Earth carries you through a path that never closes.
5:06Video · Worlds Gone Wrong
Earth’s Twin Went Wrong—Here’s How
Venus began with Earth-like ingredients and became a world that melts lead.
0:40Video · The Sun and Space Weather
A Solar Storm Set Telegraphs on Fire
In 1859, the aurora became part of the electrical grid.
1:32Video · The Sun and Space Weather
The Sun Has a Hidden Heartbeat
We mapped the inside of a star by watching its surface tremble.
1:31Video · Hidden Physics
There’s a Real Sound Coming From a Black Hole
Space can carry sound when it contains enough gas—and one cluster has been resonating for billions of years.
0:37Video · The Sun and Space Weather
Why the Sun’s Corona Is Hotter Than Its Surface
Move away from the Sun’s visible surface and the temperature rises by orders of magnitude.
1:36Video · The Sun and Space Weather
Sunlight Touching You Is 200,000 Years Old
A photon can spend longer escaping the Sun than humanity has spent building cities—then reach Earth in minutes.
1:11Video · The Sun and Space Weather
Ghost Particles From the Sun Pass Through You Every Second
The Sun’s core reaches you at night through particles that cross Earth almost untouched.
1:33Video · Worlds Gone Wrong
Venus Used to Have Oceans—Then the Sun Killed Them
Earth’s nearest planetary twin may have kept water for eons before losing the path back.
0:53Video · Worlds Gone Wrong
Venus Spins Backwards—and Its Day Is Longer Than Its Year
On Venus, the Sun rises in the west and a rotation outlasts an orbit.
1:12Video · Worlds Gone Wrong
The Planet Where You’d Watch the Sun Rise Twice
Mercury can make the Sun stop, reverse, set, and rise again in the same morning.
3:35Video · Cosmic Impacts and Planetary Defense
The Perseid Meteor Shower’s Deadly Secret
A beloved meteor shower is Earth crossing debris from a 26-kilometer comet.