#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 olfactory receptors in their noses. We have about…
I learned this today. Dogs can probably smell cancer in people. Dogs have a phenomenal sense of smell. They have 300 million olfactory receptors in their noses. We have about…
I learned this today. Steam cars outnumbered internal combustion engine cars and electric cars from 1900 until about 1907. Steam engines are external combustion engines because the fuel is burned…
I learned this today. When dogs were domesticated, their temperaments changed, their skulls, teeth, and paws shrank, their ears flopped, they became docile, their coats changed color, and they learned…
I learned this today. The first dinosaur was named 20 years before the word “dinosaur” was invented. Dinosaur fossils have probably been dug out of the ground ever since people…
I learned this today. All of the black squares in a QR code represent certain pieces of information. QR stands for Quick Response. They were invented in 1994 by Masahiro…
I learned this today. Tectonic plates move because the weight of their cold dense side pulls them into the mantle of the Earth. This is called slab pull. Hot things…
I learned this today. There are two ways of making electricity from solar power. Directly, by using sunlight to make electricity, or indirectly, by using the sunlight to make heat.…
I learned this today. Whales can hold their breath for so long because they can store oxygen in their blood and muscles. On average, whales can hold their breath for…
I learned this today. Jellyfish don’t have a brain. They also don’t have a stomach, lungs, or a heart. They just have two separate nervous systems. Jellyfish are not fish.…
I learned this today. There are different ways that animals can change their colors. Some of the ways take days and some of them take seconds. Let’s look at the…