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Mexican Coke tastes different than American Coke; after all, it’s sweetened using cane sugar instead of high-fructose corn syrup. That, at least, was the conventional wisdom until 2011, when a paper published in the journal Obesity found that Mexican Coke contained no cane sugar. Instead, the authors found plenty of glucose and fructose, which are the main ingredients in high-fructose corn syrup.

Alex made some kidney stones at home and tested prevention methods to keep them at bay.

We finally got around to checking our email and found a surprisingly interesting question from a subscriber: are trees bad?

The 15 ways that color happens. It's all about the electrons. Well, almost.

Companies around the world are fighting to buy a rare radioactive substance, despite its $30,000-per-gram price tag. This substance powers emergency exit signs that can stay bright for two decades without power, glow-in-the-dark keychains, and might one day unlock the holy grail of clean energy. What is this mystery substance?

In 2022, news broke that a critical, groundbreaking Alzheimer's research paper had allegedly been a fraud. Did fabricated scientific results accidentally set us on the right path towards a breakthrough?

A lot of people on the internet have been telling our host Alex to drink raw milk. This is a bad idea —, a particularly bad one actually. So she wanted to make a video about why it’s such a bad idea to consume raw milk, then she realized she’s been eating raw milk without even knowing it via cheese. That’s when things got complicated.

How would you stick a slice of banana to a sheet of copper? Until a few months ago, you couldn’t. But a new discovery called “hard-soft electroadhesion” enables chemists to stick almost any hydrogel to almost any metal.

L-DOPA is the best drug we have for Parkinson’s disease. If you take L-DOPA and reflect it in a mirror, you get a different molecule: D-DOPA, which does absolutely nothing for Parkinson’s and causes potentially deadly side effects. Making just L-DOPA without D-DOPA is surprisingly hard – so hard that the person who finally figured out how to do it won the 2001 Nobel Prize in Chemistry.

George and Alex dive into a 2023 case in Montana where 51 people got sick –and 2 died– from eating morel mushrooms.

This video contains incredible macro footage of supercooled water droplets nucleating ice. All George wanted to do was make a crystal-clear ice cube. Instead, he ended up rediscovering dendritic crystal growth, a beautiful phenomenon first described in the 17th century. You’ll never look at your freezer the same way again.

The ocean is getting more and more acidic. Can we solve it by emptying a giant bottle of antacid into the ocean? No… but the idea of lowering the ocean’s acidity in order to decrease global carbon dioxide levels isn’t all bad. Let’s dive into the science behind ocean alkalinization, and how it could be one part of a larger solution to our global climate crisis.