BBC One - Underwater Armageddon

Hello

Take a look at amazing video from BBC One - Underwater Armageddon.

720p & 1080p available, so watch it in HD

"A mighty army of dolphins, sharks, whales, seals and gannets hunt down the billions of sardines along South Africa's east coast each winter. This is the sardine run: an underwater Armageddon, the greatest gathering of predators anywhere on the planet, and the most spectacular event in the world's oceans"

Robot that holds a pencil

Hey!

Imagine you have a little robot that holds a pencil. Set it down on a sheet of paper and give it these instructions:

1. Move forward 3 units and turn right.

2. Move forward 1 unit and turn right.

3. Move forward 2 units and turn left.

4. Move forward 1 unit and turn left.

5. Move forward 2 units and turn right.

6. Repeat.

If the robot makes its turns at 90° angles, it will produce this figure:

But, remarkably, if it turns at 120° it will draw this: