Quick question: How old is the water you drink, shower in, or cook with? 4 seconds, 4 days, or 4 billion years old? If you said 4 billion years old, you're RIGHT! That glass of water you drank today is the same water the DINOSAURS drank! So how does the rain cycle work? How and why does it rain at all? And what would happen if it DIDN'T rain? Your kids will learn all this and more on today's new episode of Who Smarted? See omnystudio.com/listener for privacy information.