It is the 4th July, Independence Day in the USA, and NASA has successfully smashed something the size of a washing machine into a gigantic comet.
The aim of the cosmic collision, and I gather it was successful, was to find out what is inside comets. Comets are from somewhere else and believed to contain “primordial material, preserved in the deep-freeze of space, since the formation of the solar system”.
For fantastic pictures and more information on Deep Impact, visit
It is almost as exciting as that nuclear fusion reactor they agreed to build last week in the south of France.
Asteroids (and also comets) can cause tsunamis, see http://www.ipa.org.au/files/news_892.html.
There are about 100 scientists on the lookout for things from outer space that could collide with planet earth see http://22.214.171.124/impact/intro_faq.cfm.