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Penrose Diagram Pin (Limited Edition Pre-Sale)
$13.99
10% off launch sale of this pin will end midnight on August 15th Sir Roger made the diagram. We made it wearable—so everyone knows exactly where in space and time to find you. Here's the specs of your diagram: 1.5 inch enamel pin 5x8 cm holo foil backing card Rubber fasteners on backside Limited-edition Penrose pin—pre-sale ends midnight September 9th and this pin will ship by end of October-early November 2025 These Penrose Diagram inspired products are now 5% off: Penrose Diagram Shirt Penrose Diagram Hoodie Black Hole (Penrose Diagram) Rocks Glass
Black Hole (black on black) Baseball Cap
$24.99
This black hole embroidered black on black cap is so stealthy even photons can’t spot it—this all-black cap pulls your whole look past the fashion event horizon. Cross its stitched event horizon and you’ll find no escape from looking infinitely cool.
Cosmic Motion T-Shirt
$25.99
Retired scientist Dr. Jim Slater mapped the cosmic waltz of the Sun, Earth, and Moon as they surf the Milky Way—and he’s a Space Time fan to boot. He’s gifted us permission to plaster that swirling orbit diagram smack onto your chest. Slip into this tee or hoodie and you’re literally wearing a scientifically accurate GIF frame of our solar system’s galactic road trip. Perfect for flexing orbital dynamics at your next terrestrial shindig—or any other tiny patch of space-time you occupy.
Black Hole (Penrose Diagram) Rocks Glass
$22.99
A good drink can take us into timeless and spaceless space. But if you'd like to know how to actually chart your course to an actual timeless spaceless place, then enjoy this your drinks in this rocks glass that has a Penrose diagram of a black hole etched onto it. Specs: The glass is 10.5 oz This item is limited edition and will only be available for the holidays!
Black Hole Merger T-Shirt
$29.99
This binary black hole orbit t-shirt, that shows how two supermassive black hole accretion disks would warp when viewed from near the orbital plane. And it looks cool.
Black Hole Merger Hoodie
$44.99
This binary black hole orbit sweatshirt shows how two supermassive black hole accretion disks would warp when viewed from near the orbital plane. And it looks cool.
Self-Replicating Robots and Galactic Domination
19KLikes
791,402Views
2016Sep 14
To check out any of the lectures available from Great Courses Plus go to http://ow.ly/dweH302dILJ We’ll soon be capable of building self-replicating robots. This will not only change humanity’s future but reshape the galaxy as we know it. Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit:   / pbsspacetime   Support us on Patreon!   / pbsspacetime   Help translate our videos! http://www.youtube.com/timedtext_cs_p... Previous Episode - Is there a 5th Fundamental Force    • Is There a Fifth Fundamental Force? + Quan...   Should we Build a Dyson Sphere?    • Should We Build a Dyson Sphere? | Space Ti...   Self-assembling robots are referred to as von Neumann machines after the man responsible for originally proposing them, John von Neumann. Since then, the potential of these machines and their ability to proliferate throughout known space has made galactic colonization seem not only possible but perhaps inevitable. Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) References: von Neumann, John The Theory of Self-reproducing Automata, Urbana, IL: Univ. of Illinois Press. ed. A. Burks, 1966 Robert A. Freitas Jr., Ralph C. Merkle, Kinematic Self-Replicating Machines, Landes Bioscience, Georgetown, TX, 2004; http://www.MolecularAssembler.com/KSR... Robo3D R1 printing an upgrade for itself    • Robo3D R1 printing an upgrade for itself  

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