The universe is not perfect, it is full of elliptical orbits. I bet that something you didn't know. Find out how this knowledge came to be fact.

William Herschel was a classical trained musician who changed to astronomy to study the stars. He became the greatest telescope maker of his time and discovered that the Milky Way is full of stars.

This clip gives a preview of 100 Greatest Discoveries, a show about sciencce breakthroughs.

Scientist are smart but did you know that they used radio waves to find a black whole four times bigger than the sun on the other side of the Milky Way. Cool!

A great discovery at the time, the earth is not the center of the universe but the sun is. Find out how this discovery came to be.

Gamma Bursts are very big explosions, devastating, and they happen in space all the time. Some are so big we can see them light years a way.

Penicillin was one of medical sciences biggest breakthroughs.

Pasteur discovered how to "pasteurize" to keep things germ free.

Scientists are surprised to learn that the universe is speeding up.

The site of the Burgess Shale was created by an underwater mudflow entombing organisms for hundreds of millions of years

The discovery that a healthy diet with the necessary vitamins prevented many diseases without really that much effort.

Cancer cells may already be inside us on the cellular level, just waiting to be activated.

Bernard Brunhes' study of volcanic eruptions lead to the discovery of the earth's magnetic field reversal.

Early in the eighteenth century scientists first began to classify animals.

Diabetes would still take countless lives if it weren't for this unique drug.

The underground intense heat that powers old faithful, is akin to the type of conditions that according to scientists may have began life

Cancer cells may already be inside us on the cellular level, just waiting to be activated.

Early in the eighteenth century scientists first began to classify animals.

The discovery of these extinct giants have changed science forever

Sulfa drugs changed wartime medical practices forever.

The underground intense heat that powers old faithful, is akin to the type of conditions that according to scientists may have began life

When Researchers discovered these underwater marvels they were even more astonished to find life living among the 700 degree temperatures

Vaccinations were the first practice in medical history that humans had personally intervened with in the disease process.

Created by a miles long Meteor, the KT Boundary marks the end of the Dinosaurs

Diabetes would still take countless lives if it weren't for this unique drug.

Penicillin was one of medical sciences biggest breakthroughs.

The oldest hominid fossil ever found, raises questions about the diversity of life among ancient hominids

Located at the bottom of the Gulf of Mexico, this immense hole is what is thought to cause the KT Boundary

Opabinia, one of the underwater creatures discovered in the Burgess Shale, having five eyes and a trunk like appendage was unlike any animal today

The discovery that a healthy diet with the necessary vitamins prevented many diseases without really that much effort.

The site of the Burgess Shale was created by an underwater mudflow entombing organisms for hundreds of millions of years

HIV, the retrovirus that causes AIDS, continues to puzzle scientists even today, decades after their discovery.