PBS
That Time Oxygen Almost Killed Everything
Oxygen keeps us alive, but did you ever consider how Earth found the right balance? Eons produced this video as part of a larger series that explores when Earth contained very little oxygen and green oceans ruled the planet. Viewers see...
BBC
Bbc News: Disposable Planet
The Earth's population is soaring, but its resources are finite. Can we provide food, water, energy? Watch a slideshow on our planet's future, and take a quiz to measure your impact on the Earth.
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