Ovulation and menstruation | Dr Alice Roberts: Don’t Die Young
Alice explains what happens during ovulation and menstruation.Tweet
Cockatoos | Australia: Earth's Magical Kingdom
A parrot finds a tree hollow to lay her eggs in, the hollow is dry and out of reach from predators. The cockatoos also want to use the hollow for nesting and fight the parrot.
Eggs and protein | The Secrets of Your Food
Michael explains the chemical makeup of a standard chicken egg and why they are a great source of protein.