Evolve

Eyes

They are one of evolution's most useful and prevalent inventions. Ninety five percent of living species are equipped wit

Guts

It doesn't just take willpower to survive. It takes guts--in the form of a digestive system that turns food into fuel. L

Jaws

It's one of the most important developments in the history of life. An adaptation that lets animals kill, butcher, and d

Sex

In the history of life on earth, sex may be the ultimate survival skill, because the bottom line is: reproduce or die. T

Skin

It makes up 16% of your body weight, is the largest organ in the human body, allows birds to fly, mammals to nurse their

Flight

Humans have always been fascinated with the one part of the world that we could not conquer - the sky. How did the earth

Communication

How has our ability to communicate defined us as a species? Sharing information with each other has allowed humans to ri

Size

Life has evolved into a multitude of sizes. Over the course of three billion years, life has taken on many forms--from a

Venom

The deadliest natural weapon employed in the animal kingdom, venom has independently evolved in creatures as diverse as

Shape

Living organisms have entered into a battle for survival for hundreds of millions of years and the pressure to survive h

Speed

The ability to react and move can often mean the difference between life and death in the animal kingdom. Some animals h

Season 1, Episode 12

Season 1, Episode 13