How Do We Know How Old the Earth Is?

The video explores the history of lead usage and its toxic effects, highlighting Claire Patterson's work in determining Earth's age using radiometric dating. Patterson's discovery of widespread lead contamination led to his activism against lead pollution, ultimately contributing to the ban on leaded gasoline.

What role did zircons play in Patterson's research?

Describe the process of lead-lead dating and its importance in determining the age of meteorites.

What were the health effects of lead exposure mentioned in the text?

What was the outcome of Patterson's efforts to eliminate lead from the environment?