catastrophes (geology)

Discusses possible causes of the sudden extinction of dinosaurs at the close of the Cretaceous Period.

Discusses comets, asteroids, and meteors, including how and where they are formed in space, what scientists are doing to study and track them, and what danger these doomsday rocks are to Earth.

Discusses what might happen if an asteroid hit the Earth.

Investigates the science of killer asteroids, one of which is believed to have crashed into Earth sixty-five million years ago, resulting in the extinction of the dinosaurs, and discusses the chances and implications of another such collision.

Examines the origins of asteroids, their effects on hitting the Earth in the past and the present, and many of the asteroids in the solar system.

Scientists identify three "Big Bangs" crucial to the creation of the universe, beginning with the dinosaur-killing collision of Earth and a comet, to a massive thermo-nuclear star explosion and finally the original Bang believed to have started it all.

Discusses the possibility that a meteorite impact could have caused the extinction of the dinosaurs.

Examines some of the most devastating natural disasters in human history, describing the forces that cause them, the impact they have on the people who are caught in them, and the devastation that they can cause.

Explores the phenomenon of the mass extinction of species, beginning with a brief synopsis of historical geology, followed by an examination of major extinction events throughout Earth history, and a look at the major theories proposed as to why they occurred.