#79 Can dogs smell cancer?
I learned this today. Dogs can probably smell cancer in people. Dogs have a phenomenal sense of smell. They have 300 million […]
#78 Why were steam cars so popular in 1900?
I learned this today. Steam cars outnumbered internal combustion engine cars and electric cars from 1900 until about 1907. Steam engines are […]
#77 How did dogs change when they were domesticated?
I learned this today. When dogs were domesticated, their temperaments changed, their skulls, teeth, and paws shrank, their ears flopped, they became […]
#76 When were the first dinosaur bones found?
I learned this today. The first dinosaur was named 20 years before the word “dinosaur” was invented. Dinosaur fossils have probably been […]
#75 How does a QR code work?
I learned this today. All of the black squares in a QR code represent certain pieces of information. QR stands for Quick […]
#74 Why do tectonic plates move?
I learned this today. Tectonic plates move because the weight of their cold dense side pulls them into the mantle of the […]
#73 How do solar panels generate electricity?
I learned this today. There are two ways of making electricity from solar panels. Directly, by using sunlight to make electricity, or […]
#72 How can whales hold their breath for so long?
I learned this today. Whales can hold their breath for so long because they can store oxygen in their blood and muscles. […]
#71 How do jellyfish survive without a brain?
I learned this today. Jellyfish don’t have a brain. They also don’t have a stomach, lungs, or a heart. They just have […]
#70 How do animals change color?
I learned this today. There are different ways that animals can change their colors. Some of the ways take days and some […]