This is Urechis unicinctus, a species of marine spoon worm. It is also know as the fat innkeeper worm or (I bet you'll never guess why) the penis fish. They live in burrows of sand and mud and are commonly eaten raw with salt and sesame oil in Korea and parts of Japan.

I learned about something called axial precession in astronomy class several years ago, which is the idea that as something rotates along its axis, it will slowly trace out a cone if the weight of the object isn't equally distributed. In the case of Earth, Earth isn't a perfect sphere as many of us may think it is -- it actually bulges out in the middle enough for it to allow this phenomenon to occur. At the time, all I really took from this concept was how fascinating it is for the north axial pole to move 1° every 72 years from where it is now, and complete one full cycle every 26 000 years. However, I never managed to understand how this concept could fit in to my understanding of why ice ages[1] occur, and why they too follow a specific ...

"The ISS is the largest man made object in space. Here's how it compares to other notable objects, both real and fictional, all drawn to scale."

The ISS isn't just the largest space craft ever built, it's also the world's most expensive object. According the Government Accountability Office, it cost upwards of 100 billion dollars to complete.

The brownish staining of a child's tooth enamel is due to excessive ingestion of fluoride. Fluoride is a mineral compound that is useful in preventing dental caries. It is thought to work by strengthening the mineral composition of tooth enamel making it more resistant to acid attacks. It may also reduce the acid-producing ability of microorganisms in dental plaque. The water supply may naturally provide fluoride, or it may be added. Mild fluorosis causes white mottling of the teeth; severe cases show brown staining and usually occur in areas where the level of fluoride in the water is many times greater than the recommended level of 0.7 to 1.2 parts per million. ...

A Hoopoe (pronounced who-poh, scientific name: Upupa epops) is a colourful African bird which has a distinctive ‘crown’ of feathers. The species is highly distinctive, with a long, thin tapering bill that is black with a fawn base. The strengthened musculature of the head allows the bill to be opened when probing inside the soil. The hoopoe has broad and rounded wings capable of strong flight; these are larger in the northern migratory subspecies. The Hoopoe has a characteristic undulating flight, which is like that of a giant butterfly, caused by the wings half closing at the end of each beat or short sequence of beats.

Listen to it sing:

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Mr. Peebles from Pekin, Illinois, USA was claimed as the world's smallest cat. Mr. Peebles is two years old cat weighing just three pounds and measuring 6.1 inches in height. This anomaly is caused by a genetic disorder.

At first, it just looks like a worm. But when you peek closer, it slithers like a snake. It sticks its tongue out like a snake. It creeps you out like a snake.

Discovered under a rock in 2006 in Barbados, this thread snake is as thin as spaghetti and smaller than any of the 3,100 other known snake species. Researchers believe it is the smallest a snake can evolve to be.

Giant African land snails can get quite large. They are native to Africa and are routinely confiscated at airports as they are very popular as pets in the Western world, and can be considered an invasive species. There is a population of these snails spreading in Coral Gables, Florida.