First watch the video:
Physics question: why do all the images stretch as they fall?
Boobies
The Blue-footed Booby (Sula nebouxii) is my new favourite bird. It has hilarious blue feet.
The male Booby attracts females by showing off its cool blue feet and waving its wings about.
Optical phenomena
Environmental Graffiti has a great post about optical (light) phenomena; I’ve picked out a couple of my favourites:
Crepuscular Rays
Crepuscular rays are caused by the scattering of beams of light; beams created by an object such as a tree or a cloud.
Star Trails
Star trails are created when the shutter of a camera is left open for a long time (a matter of hours) and the Earth’s rotation causes the star to move through the sky, leaving a trail behind on the image. The trails are formed in circles around the North Star Polaris, (or the South Star Sigma Octanis in the southern hemisphere), the only star that appears stationary from Earth because it is directly above the axis of rotation.
Circumhorizon Arc
A circumhorizon arc is caused by the refraction of light through ice crystals in cirrus clouds; it’s a bit like a rainbow stuck in the sky.
Logic gates with dominos
Being able to construct logic gates is essential in order to create a computer. These logic gates can be created with just about anything – sticks and string, cogs and gears, even DNA. The only reason computers are electronic is because logic gates made from electronic switches can be turned on and off very quickly.
It turns out you can even build logic gates from dominos:
TV as radar
To those of you who insist physics has no use in the real world:
How to use your TV as a radar.
via SciencePunk