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Physics • Space • Time

09/09/2026

Newton’s gravity worked incredibly well.

But there was one problem: Mercury.

Its orbit didn’t behave exactly the way Newton’s theory predicted. For decades, scientists tried to figure out why.

Then Einstein changed our understanding of gravity completely.

Gravity wasn’t simply a force pulling objects together. In general relativity, mass curves spacetime, and objects follow that curved geometry.

One of the most dramatic early tests came during the 1919 solar eclipse, when astronomers measured the apparent positions of stars near the Sun, providing evidence that light was being deflected as Einstein predicted.

And that strange motion of Mercury?

General relativity explained that too.

📚 Want to learn more about the mystery of Mercury’s orbit and the road to Einstein’s theory? Check out The Hunt for Vulcan by Thomas Levenson:

👉 https://amzn.to/4A2SKJ0

As an Amazon Associate, I earn from qualifying purchases.

09/05/2026

Einstein changed how we understand the universe.

His personal life was a lot more complicated.

He married Mileva Marić, a fellow physics student. But while they were still married, Einstein fell in love with his cousin Elsa.

As his first marriage fell apart, he gave Mileva a list of conditions for staying together, including bringing him meals, keeping his room clean, and leaving him alone when he asked.

They eventually divorced. Einstein married Elsa soon after, but his relationships with other women continued.

Behind one of the greatest minds in history was a personal life that was just as complicated.

📚 Want to go deeper into Einstein’s life? Einstein: His Life and Universe by Walter Isaacson: https://amzn.to/4x9p1eC

As an Amazon Associate, I earn from qualifying purchases.

09/02/2026

Could a wormhole actually be a time machine? 🌀⏳

Put one end near a black hole, and something strange happens. Time could pass at a different rate at each opening, theoretically creating a shortcut not just through space, but through time.

There’s just one problem: we don’t know if traversable wormholes actually exist.

📚 Want to go deeper? Black Holes & Time Warps by Kip Thorne: Amazon affiliate link⁠: https://amzn.to/4wZqi88

As an Amazon Associate, I earn from qualifying purchases.

08/29/2026

Gravity isn’t actually a force. 🤯

Einstein showed us a very different picture: objects aren’t being pulled through space. They’re following the curves of spacetime.

And that familiar “gravity well” you’ve probably seen? Even that is only part of the picture.

📚 Want to go deeper? Black Holes & Time Warps: Einstein’s Outrageous Legacy by Nobel Prize-winning physicist Kip Thorne:
https://amzn.to/4xpzSC6

As an affiliate, I may earn from qualifying purchases.

08/26/2026

What if EVERYTHING in the universe is made of tiny vibrating strings? 🤯

String theory suggests that deep beneath the particles we know, there may be tiny vibrating strings, with different vibrations appearing as different particles.

And if the theory is right, it could help unite gravity with quantum physics.

📚 Want to go deeper? Check out The Elegant Universe by Brian Greene: https://amzn.to/4gvGbwC

As an Amazon Associate, I earn from qualifying purchases.

08/22/2026

Einstein famously called quantum entanglement “spooky action at a distance.”

Two particles can become entangled, creating correlations that persist even when they’re separated by enormous distances.

It was so strange that Einstein believed quantum mechanics had to be missing something.

Nearly a century later, experiments have repeatedly confirmed the extraordinary predictions of quantum entanglement.

Want to go deeper into why quantum mechanics troubled Einstein so much? Sean Carroll’s Something Deeply Hidden is a fascinating exploration of the strange foundations of quantum mechanics.

📚 Something Deeply Hidden: https://amzn.to/4yfeUGn

As an Amazon Associate I earn from qualifying purchases.

08/19/2026

In 1925, Cecilia Payne discovered something that changed astronomy forever.

Stars are made mostly of hydrogen and helium.

The result was so unexpected that she was persuaded to downplay it in her thesis.

Four years later, the astronomer who had doubted her reached the same conclusion.

Payne was right.

Her discovery fundamentally changed our understanding of the universe, yet her name is still largely unknown.

If you want to learn more about her story, What Stars Are Made Of by Donovan Moore is a great place to start:

📚 https://amzn.to/4g6V5L9

As an Amazon Associate I earn from qualifying purchases.

08/14/2026

What would a 4D cube actually look like?

Start with a dot.

Copy it and connect the two points. You get a line.

Do it again. You get a square.

Again. A cube.

And one more time…

You get something our brains weren’t built to see: a tesseract, the four-dimensional version of a cube.

We can’t actually see four spatial dimensions, but we can visualize what a 4D object might look like in 3D space.

Could you picture a fourth spatial dimension in your head?

08/11/2026

What if you could never experience your own death? 🤯

It sounds impossible.

But a bizarre thought experiment based on the Many-Worlds interpretation of quantum mechanics raises exactly that question.

It’s called quantum immortality.

No, quantum mechanics doesn’t say you’re immortal. But the idea leads to one seriously strange question:

Could you ever experience a universe where you no longer exist?

📚 Want to go deeper?
Something Deeply Hidden by Sean Carroll is a fascinating exploration of quantum mechanics and the Many-Worlds interpretation.

👉 https://amzn.to/4xFr62S

As an Amazon Associate, I earn from qualifying purchases.

08/08/2026

Einstein believed the universe followed clear, predictable rules.

Niels Bohr believed something far stranger: at its core, reality is uncertain.

Einstein famously pushed back:

“God does not play dice.”

Bohr’s response?

“Stop telling God what to do.”

They argued about the nature of reality for years.

Nearly a century later, the debate still shapes how we think about quantum physics.

So who was closer to the truth?

📚 Want to go deeper into the Einstein-Bohr debate?
https://amzn.to/4wQFpBu

As an Amazon Associate, I earn from qualifying purchases.

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