See if you can spot this on your next flight: Every runway at the airport has a different number on each end. Of course, these numbers aren't random. They are decided by an insanely complex system that all airports stick to. This is worth watching just to show off your newfound knowledge someday!

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When you look at a photo of someone in their teens or 20s today compared to someone at that age in say, the '50s, you'll probably notice something striking: The person in the older photo looks a lot older. Did people age faster back then? Or is it really just our perception of how "grown-up" young people looked decades ago? Turns out, it's both.

The cone snail can be found in oceans all around the world. These tiny creatures use venom to paralyze their prey and devour them whole. Scientists have recently discovered that this venom can also be used to treat people with chronic pain. Whoa. What else can this venom do for humans?

For decades, we've used virtual reality in the field of medicine, for designing automobiles and for flight simulations. Considered the "next big thing" in modern technology, VR devices may be the future of smart home tech. While that isn't the case yet, we're certainly getting close, as illustrated by this fascinating overview of VR's history.

Big Tech is supposed to safely handle our personal online data, but now they’re getting into the political game. I don’t want to be any part of that, and neither should you. That’s why I trust and use ExpressVPN.

These Big Tech companies match your internet activity to your identity or location by using your public IP address, but with ExpressVPN, no one can see your IP address — no one.