dimitriadis21's channel

Why do some years have an extra leap day and what is it for?

Also check out MinutePhysics' video: http://www.youtube.com/watc... & SciS...

... für alle Geburtstagskinder

Free learning from The Open University http://www.open.edu/openlea...

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The landing of th...

It's leap year time... so what are years, anyway? And what do they have to do with the supermassive black hole in the core of the milky way?

Mr. G...

Jamiroquai - Alright, LIVE,

Stadthalle Wien 28.03.2011

Michalis Vourtsis plays "The Eye Of The Tiger" (Survivor)

IMIS, R.C. "Athena"

IPSYP

hkust atrium