4. What Happened to the Dinosaurs? There are many theories about why the dinosaurs vanished from the planet.
One theory that many people believe is that a gigantic meteorite smashed
into the Earth. Scientists believe that the meteorite was very big and that
the impact may have produced a large dust cloud that covered the Earth for
many years. The dust cloud may have caused plants to not receive sunlight
and the large plant eaters, or herbivores, may have died off, followed by the
large meat eaters, or carnivores. This theory may or may not be true, but it
is one explanation as to why these giant reptiles no longer inhabit the Earth.
4.