PBS Space Time

Does Antimatter Create Anti-Gravity?

For many years, physicists have wondered whether a certain well-known exotic material may experience gravitational repulsion from the Earth. That material is antimatter, and physicists at CERN have just completed a very long and very difficult experiment to answer a seemingly simple question: does antimatter fall down, or does it fall up?

Does Antimatter Create Anti-Gravity?

16m 30s

  • Is Gravity RANDOM Not Quantum?: asset-mezzanine-16x9

    Is Gravity RANDOM Not Quantum?

    S10 E19 - 19m 26s

    The holy grail of theoretical physics is to find the long-sought theory of quantum gravity. But what if this theory is as mythical as the grail of legend? What if gravity isn’t weirdly quantum at all, but rather … just a bit messy? Or random? So says the postquantum gravity hypothesis of Jonathan Oppenheim.

  • Can We Create New Elements Beyond the Periodic Table: asset-mezzanine-16x9

    Can We Create New Elements Beyond the Periodic Table

    S10 E18 - 17m 2s

    Scientists have been slowly extending the periodic table one element at a time, pushing to higher and higher masses, and have discovered some incredibly useful materials along the way. But the elements at the current end of the table are so unstable that they decay almost as soon as they’re created in our particle accelerators. Astronomers have found a cosmic phenomenon that may populate table.

  • Do Black Holes Have to Be Black?: asset-mezzanine-16x9

    Do Black Holes Have to Be Black?

    S10 E17 - 15m 32s

    It turns out there is a way to make a coloured black hole—as long as by colour you mean quantum chromodynamic charge.

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