Why Do Rivers Curve?

All it takes to turn a straight stretch of river into a bendy one is a little disturbance and a lot of time, and in nature, there’s plenty of both. A river’s course changes over time, and the processes that have influenced the formation of the landscapes we see both here on Earth and in the…

Why do our knuckles pop?

Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous? When you “crack” your knuckles or any other joint, it expands the space between your bones, creating negative pressure that draws synovial fluid into the new gap. This influx of synovial fluid…

The Arctic vs. the Antarctic

How can you tell the two poles apart? Where are the penguins? What about the bears? The Arctic pole is located in the Northern Hemisphere within the deep Arctic Ocean, while the Antarctic pole is smack in the middle of the ice-covered Antarctica. Unlike Antarctica, the Arctic is not a continent which is the predominant difference between the…

Why are sloths so slow?

Sloths spend most of their time eating, resting, or sleeping; in fact, they descend from their treetops canopies just once a week, for a bathroom break. Sloths have an extremely low metabolic rate, which means they move at a languid, sluggish pace through the trees. On average, sloths travel 41 yards per day—less than half…

What will happen if we don’t drink water?

Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. Water helps to plump up your skin, so you should be able to imagine what dehydration will do! When you don’t drink enough water, the collagen begins to crack and bind together, causing fine lines and wrinkles to get more noticed. We rely on water to keep…