Australia's First 4 Billion Years: Strange Creatures
After a massive extinction, diverse marsupials came to dominate this isolated continent.
Australia's First 4 Billion Years: Life Explodes
Part 2 of 4. The move of life from ocean to land.
Mystery of a Masterpiece
Examining the work of art sleuths.
Big quakes are inevitable, but can we prevent their devastation?
The story of conjoined twins Trishna and Krishna.
D-Day's Sunken Secrets
Exploring the relics on the sea floor near Normandy, France.
9/4/14 2:00 AM
9/4/14 5:00 AM
9/4/14 7:00 PM
9/5/14 12:00 AM
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Time. We waste it, save it, kill it, make it. The world runs on it. Yet ask physicists what time actually is, and the answer might shock you: They have no idea.
Even more surprising, the deep sense we have of time passing from present to past may be nothing more than an illusion. How can our understanding of something so familiar be so wrong?
In search of answers, Brian Greene takes us on the ultimate time-traveling adventure, hurtling 50 years into the future before stepping into a wormhole to travel back to the past. Along the way, he will reveal a new way of thinking about time in which moments past, present, and future—from the reign of T. rex to the birth of your great-great-grandchildren—exist all at once.
This journey will bring us all the way back to the Big Bang, where physicists think the ultimate secrets of time may be hidden. You'll never look at your wristwatch the same way again.
From The World's Science podcast to Nova, we'll deliver updates from these cutting edge programs. See a sample »