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Are We Aliens? The Evidence Is Stranger Than You Think

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In 1969, a fireball exploded over a tiny town in Australia, and the rocks that fell were hiding a secret about YOU. Grab your backpack and join Dr. PX on a space adventure to answer one big, weird question: are we aliens?

Four stops, one tiny superhero, and a twist at the end: 🪨 Space rocks carrying the building bricks of life 🛰️ The NASA spacecraft that grabbed a piece of an asteroid (like a claw machine… in outer space!) 🐻 The water bear that survived open space 🔴 The "leopard spots" a NASA rover found on Mars ⭐ And why every bit of you was cooked inside a star

Chapters

  1. 0:00 A fireball over Australia (opens in a new tab)
  2. 0:40 Stop 1: The rocks from the sky (opens in a new tab)
  3. 1:42 Stop 2: Asteroid Bennu (opens in a new tab)
  4. 2:49 Meet the water bear (opens in a new tab)
  5. 3:46 Stop 3: Mars (opens in a new tab)
  6. 4:36 Final stop: You (opens in a new tab)
  7. 5:24 Your turn: where would you send a water bear? (opens in a new tab)

Sources

  1. Murchison meteorite fell on a Sunday morning, 28 September 1969, near Murchison, Australia; a fireball broke apart and fragments fell over farmland

  2. Amino acids found inside the Murchison rocks; some kinds are not used by living things on Earth, so they formed in space (v2 C03)

  3. Amino acids link up into proteins; muscles, hair and nails are made of proteins

  4. OSIRIS-REx touched asteroid Bennu and collected dust; capsule parachuted into the Utah desert in 2023; samples opened in clean rooms; 14 of the 20 protein amino acids and all five nucleobases of DNA and RNA (v2 C05)

  5. Tardigrades (water bears): about the size of a grain of sand, eight legs; in 2007 thousands rode on the outside of a spacecraft (ESA FOTON-M3); no air, freezing, UV over 1,000× Earth's surface; some survived and had offspring (v2 C08)

  6. Some meteorites found on Earth came from Mars, blasted off by impacts (v2 C06)

  7. Perseverance found a rock with "leopard spots" (Cheyava Falls, 2024); on Earth such features are often made by microbes; NASA: potential sign of ancient life, not proof (v2 C11)

  8. The carbon, oxygen and iron in your body were made in stars that exploded before the Sun formed (v2 C01, C14)

Spotted a mistake or have a question? Ask Dr. PX

Credits

Photos: NASA (public domain); Murchison meteorite by Art Bromage, CC BY-SA 2.0; tardigrade by DSparrow14, CC BY-SA 4.0. Music: YouTube Audio Library. Sound effects: original. Narration: AI-generated voice.

Photo & music licences