Time warp

Time is measured in seconds, minutes and hours. But these talks show it isn't always so simple.

  1. 6:34
    Philip Zimbardo The psychology of time

    Psychologist Philip Zimbardo says happiness and success are rooted in a trait most of us disregard: the way we orient toward the past, present and future. He suggests we calibrate our outlook on time as a first step to improving our lives.

  2. 17:40
    David Christian The history of our world in 18 minutes

    Backed by stunning illustrations, David Christian narrates a complete history of the universe, from the Big Bang to the Internet, in a riveting 18 minutes. This is "Big History": an enlightening, wide-angle look at complexity, life and humanity, set against our slim share of the cosmic timeline.

  3. 14:08
    Rachel Sussman The world's oldest living things

    Rachel Sussman shows photographs of the world's oldest continuously living organisms — from 2,000-year-old brain coral off Tobago's coast to an "underground forest" in South Africa that has lived since before the dawn of agriculture.

  4. 6:49
    Dan Gilbert The psychology of your future self

    "Human beings are works in progress that mistakenly think they're finished." Dan Gilbert shares recent research on a phenomenon he calls the "end of history illusion," where we somehow imagine that the person we are right now is the person we'll be for the rest of time. Hint: that's not the case.

  5. 15:54
    Sean Carroll Distant time and the hint of a multiverse

    Cosmologist Sean Carroll attacks — in an entertaining and thought-provoking tour through the nature of time and the universe — a deceptively simple question: Why does time exist at all? The potential answers point to a surprising view of the nature of the universe, and our place in it.

  6. 15:38
    Wendy Freedman This telescope might show us the beginning of the universe

    When and how did the universe begin? A global group of astronomers wants to answer that question by peering as far back in time as a large new telescope will let us see. Wendy Freedman headed the creation of the Giant Magellan Telescope, under construction in South America; at TEDGlobal in Rio, she shares a bold vision of the discoveries about our universe that the GMT could make possible.

  7. 14:04
    Rives The Museum of Four in the Morning

    Beware: Rives has a contagious obsession with 4 a.m. At TED2007, the poet shared what was then a minor fixation with a time that kept popping up everywhere. After the talk, emails starting pouring in with an avalanche of hilarious references—from the cover of "Crochet Today!" magazine to the opening scene of "The Metamorphosis." A lyrical peek into his Museum of Four in the Morning, which overflows with treasures.