We live under constant pressure, physically, from the weight of the atmosphere. We can demonstrate how much by imploding a can with nothing but atmospheric pressure. It turns out this pressure is the weight of several elephants pushing on us all the time.

Here's a simple activity that demonstrates both exponential growth and decay by folding a piece of paper in half a many times as possible. Also, today I'm joined by some special guests, Hansel and Pretzel, the science bunnies. I could only do it 6 times, can you get higher?

I wanted to demonstrate how anyone can use a little science to drive change. This is a simple science experiment that started with an observation - there's always a little water left in a water bottle. The result is if 1/4 of all discarded water bottles have a small amount of water left in them and the cap is not taken off, then we are losing an Olympic-sized swimming pool every 12 hours. That's the amount of water needed for 8 million people lost every year. Not good, but people don't know. See for yourself and spread the word.

Here's a method to always win at the game, I Spy, and at the same time secretly learn about something called exponential decay. A mathematical concept that applies to everything from the cooling of a cup of coffee to radioactivity decay.

With the recent launch of Artemis II, the first manned mission to the moon in 53 years, I wanted to take the opportunity to talk about the actual scale of space. We have all seen so many images of the solar system that are scaled for presentation that I'm afraid we've lost any sense of an accurate model for how immense space actually is. To scale it down to a manageable size, if the Earth was the size of a basketball the moon would be the size of a tennis ball. How far apart should they be in this model? The answer might surprise you!