How Everything in Physics Fits Together – Map

Unless you have an innate knowledge of physics, it’s pretty hard to figure out how all the concepts and theories fit together

Physics is a huge, complex field. It also happens to be one of the most fascinating, dealing with everything from black holes and wormholes to quantum teleportation and gravitational waves.

But unless you have an innate knowledge of the field, it’s pretty hard to figure out how all these concepts actually fit together.

After all, everyone is constantly trying to prove Einstein wrong, and Stephen Hawking famously struggled to come up with a ‘theory of everything’, so it’s easy to get confused about how things do actually fit together in physics (if at all).

YouTuber Dominic Walliman has created a map that shows how the many branches of physics link together, from the earliest days of classical physics and Isaac Newton, all the way through to Einstein’s relativity and quantum physics (with a little bit of philosophy thrown in there for good measure). Continue reading “How Everything in Physics Fits Together – Map”

Physicists Can’t Agree On Whether Or Not Time Is Real

Physicists can’t agree on whether the flow of future to past is real or a mental construct.


According to our best theories of physics, the universe is a fixed block where time only appears to pass. Yet a number of physicists hope to replace this “block universe” with a physical theory of time.

Einstein once described his friend Michele Besso as “the best sounding board in Europe” for scientific ideas. They attended university together in Zurich; later they were colleagues at the patent office in Bern. When Besso died in the spring of 1955, Einstein — knowing that his own time was also running out — wrote a now-famous letter to Besso’s family. “Now he has departed this strange world a little ahead of me,” Einstein wrote of his friend’s passing. “That signifies nothing. For us believing physicists, the distinction between past, present and future is only a stubbornly persistent illusion.”  Continue reading “Physicists Can’t Agree On Whether Or Not Time Is Real”