Exotic Chemistry: World's Oldest Water and The Rarest Element

Where was the world's oldest water system discovered, and how old is it estimated to be?

• 1.5 km under Quebec, Canada, 2 billion years old

• 2.5 km under Ontario, Canada, 1.5 billion years old

• 3.0 km under British Columbia, Canada, 1 billion years old

• 2.0 km under Alberta, Canada, 2.5 billion years old

What makes the newly discovered ancient water system unique compared to other old water pockets?

• It is much colder than other water pockets.

• It contains chemicals that can support life and is a flowing system.

• It is found closer to the surface, making it easier to study.

• It is completely pure and free of any dissolved minerals.

What is a key characteristic of Astatine that makes it difficult to study?

• It is extremely common and found everywhere.

• It has a very long half-life, making it stable.

• It is the rarest naturally occurring element and its most stable isotope has a half-life of only about 8 hours.

• It is a noble gas and does not react with other elements.

How might Astatine be used in medical treatments?

• As a common ingredient in pain relievers.

• To create new types of surgical tools.

• In targeted alpha therapy to precisely destroy cancer cells without harming healthy tissue.

• As a diagnostic tool for imaging bones.