What on Earth?
Experts investigate a war-torn fortress with a connection to the ruins of a military installation.
2026-07-12 17:24:00 +0000 UTC→2026-07-12 18:12:00 +0000 UTC(48m)
Schedule for Space & Beyond
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NASA's Unexplained Files
The swirling gases of Saturn form a perfect hexagon that has hovered above the planet for 30 years.
2026-07-23 15:39:00 +0000 UTC→2026-07-23 16:30:00 +0000 UTC(51m)
NASA's Unexplained Files
A distant planet shows an Earth-like atmosphere; a glowing light suggests an atmosphere on the Moon.
2026-07-23 14:50:00 +0000 UTC→2026-07-23 15:39:00 +0000 UTC(49m)
NASA's Unexplained Files
A piece of the sun seems to have vanished; the Hubble spots an unidentified object.
2026-07-23 13:59:00 +0000 UTC→2026-07-23 14:50:00 +0000 UTC(51m)
NASA's Unexplained Files
Life may have been found on Mars; mysterious Moon Pigeons.
2026-07-23 13:08:00 +0000 UTC→2026-07-23 13:59:00 +0000 UTC(51m)
Great American Eclipse
Images of the first total solar eclipse in the continental United States in 99 years.
2026-07-23 09:21:00 +0000 UTC→2026-07-23 13:08:00 +0000 UTC(3h47m)
How the Universe Works
Cutting-edge discoveries about the sun challenge everything known about its atmosphere.
2026-07-23 08:33:00 +0000 UTC→2026-07-23 09:21:00 +0000 UTC(48m)
How the Universe Works
Experts explore what really happens when the two most powerful objects in the cosmos clash.
2026-07-23 07:43:00 +0000 UTC→2026-07-23 08:33:00 +0000 UTC(50m)
How the Universe Works
How the extended operation of two Voyager spacecraft transformed into the ultimate mission.
2026-07-23 06:55:00 +0000 UTC→2026-07-23 07:43:00 +0000 UTC(48m)
How the Universe Works
New discoveries reveal that black holes might have been essential to building the universe itself.
2026-07-23 06:07:00 +0000 UTC→2026-07-23 06:55:00 +0000 UTC(48m)
How the Universe Works
Mankind comes closer to keeping Earth safe from killer space rocks.
2026-07-23 05:19:00 +0000 UTC→2026-07-23 06:07:00 +0000 UTC(48m)
How the Universe Works
New discoveries reveal the secrets of hundreds of strange, tiny worlds called dwarf planets.
2026-07-23 04:31:00 +0000 UTC→2026-07-23 05:19:00 +0000 UTC(48m)
How the Universe Works
Some exoplanets resemble earth enough that one could be a new home for humanity.
2026-07-23 03:43:00 +0000 UTC→2026-07-23 04:31:00 +0000 UTC(48m)
How the Universe Works
If a massive asteroid collides with Earth, it could end life on the planet as one knows it.
2026-07-23 02:07:00 +0000 UTC→2026-07-23 03:43:00 +0000 UTC(1h36m)
How the Universe Works
A supernova hasn't occurred in 400 years, and the search is on to locate which star may be next.
2026-07-23 01:16:00 +0000 UTC→2026-07-23 02:07:00 +0000 UTC(51m)
How the Universe Works
New discoveries reveal a supermassive black hole from the earliest days of the cosmos.
2026-07-23 00:28:00 +0000 UTC→2026-07-23 01:16:00 +0000 UTC(48m)
How the Universe Works
New discoveries reveal how neutrinos pass through objects undetected.
2026-07-22 23:40:00 +0000 UTC→2026-07-23 00:28:00 +0000 UTC(48m)
How the Universe Works
New discoveries about neutron stars, strange and violent phenomena that defy the laws of physics.
2026-07-22 22:52:00 +0000 UTC→2026-07-22 23:40:00 +0000 UTC(48m)
How the Universe Works
Spacetime is the secret structure that controls our universe, time, light, and energy.
2026-07-22 22:04:00 +0000 UTC→2026-07-22 22:52:00 +0000 UTC(48m)
How the Universe Works
We're counting down NASA's top six sci-fi film-worthy stars.
2026-07-22 21:16:00 +0000 UTC→2026-07-22 22:04:00 +0000 UTC(48m)
How the Universe Works
Mercury has a dangerous secret that may one day threaten life on Earth.
2026-07-22 20:28:00 +0000 UTC→2026-07-22 21:16:00 +0000 UTC(48m)
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