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See video Undersea Volcano Erupts near Tonga

An undersea volcano erupts near the island of Tongatapu, Tonga, where up to 36 undersea volcanoes are clustered (also known as 'submarine volcanoes'). Fortunately it did not pose a danger to residents of the island.

1:34 476 3.71
See video Magic Trick Cartesian Diver

How to make a Cartesian Diver which seemingly floats or sinks upon command. Demonstrates the principles of density and bouyency.

0:00 88 3.70
See video Knut the little polar bear

A compilation of cute videos and pictures of Knut, the famous polar bear born in captivity in Berlin Zoo.

7:41 1090 3.65
See video Aurora Northern Lights Timelapse

Auroras are colorful displays of light in the sky, most commonly seen in the polar regions. 

1:04 1416 3.64
See video Levitating a frog using diamagnetic levitation

Magnetic levitation can be used to suspend an object or even live animals such as frogs or grasshoppers. This requires a very strong magnetic field in the range of 16 Teslas. 

0:09 216 3.60
See video The birth of a baby Orangutan

Orangutans are highly intelligent, shy, solitary apes. An exception is the relationship between mother and offspring - mother orangutans stay with their babies for six or seven years. They are an endangered species, in particular the Sumatran orangutan of which only several thousand remain in the wild.

2:39 1013 3.60
See video Boomerang thrown in zero gravity aboard the ISS

What is the flight path of a boomerang in zero-gravity? Japanese astronaut Dr. Takao Doi finds out.

0:19 453 3.54
See video Cloud gravity waves

Gravity waves (not to be confused with gravitational waves) are waves generated at the interface between two media, for example the ripples created by a rock thrown into a pond. In the atmosphere, it is the result of air rising and sinking, gradually moving back towards its equilibrium point.

0:32 624 3.50
See video Sneaky cat gets closer without moving

This really sneaky ninja-like cat gets closer and closer...but never seems to move.

1:14 23666 3.44
See video Modernizing India

 A journey through the rapidly modernizing India.

3:36 344 3.41
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