This topic contains a solution. Click here to go to the answer
 

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

For a complete list of videos, visit our video library