notes

The lecture is about the space.This lecture introduce the space is from the past to now. Why dinosaurs were disappear.Because the stony meteorites hurt the earth.Stony meteorites are between earth and planets.They're so many and so small that make you ignore them.This damage makes people know how dangerous of stony meteorites are!Scientists give us an example: if the meteority hurts the sea coast,miles far from here of the places will be whelmed.Scientists use some datas to see how earth and stony meteorites' track.People in order to control them to use some machines to affect their speed.Scientists have said people damage stony meteorites is the worst way to deal with the problem.