2008
VLF Radio Signals
by rike_
The source of most natural radio signals is lightning. When a lightning bolt strikes, a massive amount of charge is moved and this acts in much the same way as moving charge in a radio transmitting antenna. The frequencies emitted by lightning range from 0 Hz to over 100 kHz with all frequencies being emitted simultaneously with the visible flash of lightning.
2007
Mars Rover Celebrates Milestone
by cflick
More than 910 days after its "90-day warranty" expired, NASA's rover Spirit is still carrying out its mission on Mars. Discovery News reporter Jorge Ribas finds out how the robot has lasted so long.
2006
BBC Documentary - Space - Episode 2 - Staying Alive - Google Video
by phgod
The Universe is a dangerous place. This programme investigates our survival in space.
47億打造日本版「太陽神」計劃 - Yahoo! 新聞
by phgod
「【明報專訊】「地球」號鑽地計劃由日本「地球深部探查中心」策劃，美國、歐盟及中國攜手參與，是歷來規模最大的深海鑽探工程，鑽地深度也是史無前例。」
2005
BBC School: Science Clips: More Gr 4-5
by knann
Grade 4 science games
Directions: Click on the game button then on the full screen button for the best view.
Sunlit Earth
by sunny
La terre ensoleillée à ce moment précis. Un magnifique applet java, l'explication du calcul est très interressante aussi :)
1
(18 marks)
