Jim Al-Khalili investigates the amazing science of gravity, recreating groundbreaking experiments, including the moment when Galileo first worked out how to measure it. He investigates gravity waves, finds out from astronauts what it's like to live without gravity, sets out to find where in Britain gravity is weakest and so where we weigh the least, and helps design a smartphone app that volunteers use to demonstrate how gravity affects time and makes us age at slightly different rates.
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Just how small are atoms? And what's inside them? The answers turn out to be astounding, even for those who think they know. This fast-paced animation uses spectacular metaphors (imagine a blueberry the size of a football stadium!) to give a visceral sense of the building blocks that make our world.
What does quantum mechanics tell us about our world -- or are there many worlds due to probability waves? How does the general theory of relativity mesh with quantum mechanics? If you've wished you understood quantum mechanics (or at least grasped the basics) physicist Brian Greene can help!
S1E1 • Curiosity Retreats: 2015 Lectures • 2015 • Physics
The Heisenberg Uncertainty Principle states that you can never simultaneously know the exact position and the exact speed of an object.
Let’s talk about the best evidence we have that the theories of quantum physics truly represent the underlying workings of reality.
PBS Space Time • 2018 • Physics
We hold a unique knowledge of time, realising that it stretches deep into the past, and will continue into the future. How does this affect our sense of who we are?
It appears we live in a universe filled with light. But scientists are now certain there is far more matter in the dark portions of our universe.
S5E10 • Through the Wormhole • Physics