Extras

Video thumbnail: NOVA Harvesting Electricity from Sand

NOVA

Harvesting Electricity from Sand

When it comes to generating power, shining light on silicon opens up many possibilities.

Harvesting Electricity from Sand

Video thumbnail: NOVA Treasures of the Earth: Power Preview

NOVA

Treasures of the Earth: Power Preview

Drill underground to see the treasures that power our world—today and into the future.

Treasures of the Earth: Power Preview