Neil deGrasse Tyson explains radioactive decay. He explains how we can determine the age of a rock using meteorites and illustrates that atoms undergo nuclear transmutations over time until they become stable elements.

Recounts the discovery of artifacts related to Queen Nefertiti, who wielded considerable power alongside her husband, the Pharaoh Akhenaten. She is known also a beautiful queen, even attested in poems of her husband.

Mr. Johnson from the Bank of Central Victoria talks to students about the importance of saving for key expenses and retirement. He writes out the compound interest formula to explain why they would have $727,000 in 25 years if they save 50 cents per week with the bank and the interest doubles their investment every 3 years.

Fry experiences the effects of compound interest on his savings. He started with 93 cents in his bank account 1,000 years ago, and it has had an average 2.25% interest rate over the 1,000 years. Fry learns that he is now a billionaire.

Ancient Mesopotamia proved that fertile land and the knowledge to cultivate it was a fortuitous recipe for wealth and civilization. Learn how this "land between two rivers" became the birthplace of the world's first cities, advancements in math and science, and the earliest evidence of literacy and a legal system.