Reconsider a schoolyard close encounter that captured the imaginations of UFO believers around the world in the 1990s. Discover how skeptics discredited the eyewitness accounts of two groups of schoolchildren and relabelled them as mass hysteria.

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Artemis 2

We can’t see it, but dark energy is thought to be a main force shaping the universe. View the latest work to reveal the mysteries of this phenomenon, including a dark energy camera and telescope that will search for it in the movement of galaxies.

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Humanity may not colonize planets—we may build our own worlds. Explore how rotating space habitats could spread across the Solar System and beyond, forming a vast diaspora of artificial worlds that reshape civilization and interstellar expansion.

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Watch my exclusive video Settling Saturn’s Rings: https://nebula.tv/videos/isaacarthur-settling-saturns-rings-exploring-the-origins-resources-and-future-habitats-of-a-halo-world

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Credits:
The Space Habitat Diaspora – Humanity Spreads Without Planets
Written, Produced & Narrated by: Isaac Arthur
Graphics from Bryan Versteeg, Jeremy Jozwik, Sergio Botero, Udo Schroeter
Select imagery/video supplied by Getty Images

0:00 Intro – Rethinking What a World Can Be
2:37 Why Habitats Win on Physics, Engineering… and Scalability
10:13 The Birth of a Habitat Civilization
14:54 Nebula
15:54 Life Without Planets: Cultures That Grow in Steel Valleys
18:59 Resilience: Fragile Shells, Immortal Civilizations
21:37 The True Diaspora: Leaving the Solar System

Humanity may not colonize planets—we may build our own worlds. Explore how rotating space habitats could spread across the Solar System and beyond, forming a vast diaspora of artificial worlds that reshape civilization and interstellar expansion.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur
Watch my exclusive video Settling Saturn’s Rings: https://nebula.tv/videos/isaacarthur-settling-saturns-rings-exploring-the-origins-resources-and-future-habitats-of-a-halo-world

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/
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Credits:
The Space Habitat Diaspora – Humanity Spreads Without Planets
Written, Produced & Narrated by: Isaac Arthur
Graphics from Bryan Versteeg, Jeremy Jozwik, Sergio Botero, Udo Schroeter
Select imagery/video supplied by Getty Images

0:00 Intro – Rethinking What a World Can Be
2:37 Why Habitats Win on Physics, Engineering… and Scalability
10:13 The Birth of a Habitat Civilization
14:54 Nebula
15:54 Life Without Planets: Cultures That Grow in Steel Valleys
18:59 Resilience: Fragile Shells, Immortal Civilizations
21:37 The True Diaspora: Leaving the Solar System

Italy’s Mount Etna is one of the best places for volcano watchers. Join a team heading to Italy to capture a paroxysmal eruption which produces spectacular lava fountains that can shoot as high as a kilometre into the sky.

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These are the witnesses that have been literally touched by the unknown. Physical contact events that take the shape of nightmares, complete with alien examinations…inexplicable metal implants discovered inside human bodies…lives are changed by this physical brush with our greatest mystery. These eyewitnesses feel chosen, for something they likely never wished for. Do these cases hold the answer to the central questions of UFOlogy: what do these visitors want from us? Are we merely test bodies in what, from space, might be seen as a giant Petrie dish?

Watch the full episode here! 👉 https://youtu.be/I-ZG8idC2cU

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Mike Moses, President of Virgin Galactic’s Spaceline, recaps our latest milestones.

Welcome to Virgin Galactic – The Spaceline for Earth.

Register for updates and spaceflight reservations at https://www.virgingalactic.com/.

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Is science nearing its limits? We explore whether humanity could ever run out of discoveries?
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Credits:
The End of Science
Episode 488a; Originally Aired: March 1, 2025; Nebula Exclusive
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Phase Shift, “Forest Night”
Chris Zabriskie, “Unfoldment, Revealment”, “A New Day in a New Sector”, “Oxygen Garden”
Stellardrone, “Red Giant”, “Billions and Billions”

These are the witnesses that have been literally touched by the unknown. Physical contact events that take the shape of nightmares, complete with alien examinations…inexplicable metal implants discovered inside human bodies…lives are changed by this physical brush with our greatest mystery. These eyewitnesses feel chosen, for something they likely never wished for. Do these cases hold the answer to the central questions of UFOlogy: what do these visitors want from us? Are we merely test bodies in what, from space, might be seen as a giant Petrie dish?

Watch the full episode here! 👉 https://youtu.be/I-ZG8idC2cU

Subscribe for more videos! ☄️ https://www.youtube.com/@SpaceRip

Find us on social media!

X: https://ow.ly/FZBj50StcJb
FB: https://ow.ly/1J7y50StcFW
TikTok: https://ow.ly/XmLR50StcKY

Your home for exploring science and the cosmos 🪐

#space #science #ufo #aliens