The Most Expensive Materials on Earth
Antimatter costs an astronomical $62.5 trillion per gram—more than the GDP of most countries combined. From medical isotopes to precious metals, here are the rarest materials on the planet.

Antimatter costs an astronomical $62.5 trillion per gram—more than the GDP of most countries combined. From medical isotopes to precious metals, here are the rarest materials on the planet.

While China leads annual emissions, the United States has contributed the most total CO2 in history. Cumulative emissions reveal who bears the greatest responsibility for climate change.