#1: The Post-Oil Era BeginsElectricity may be what fuels our future—electricity from renewables, nuclear, and even from burning biomass.
#4: Slime Is Turning the Seas Into Dead ZonesPollution, overfishing, and the rise of microbes spell doom for many bodies of water.
#5: Nations Stake Their Claims to a Melting ArcticUndiscovered oil and gas reserves below the ice set off a polar gold rush.
#20: The “Doomsday Vault” Stores Seeds for a Global Agriculture RebootHumanity's chances to survive global warming and nuclear attacks just increased.
#25: EPA Searches Soul, Tries to Figure out If It's a Climate CopThe agency moves toward acting on greenhouse gases, but change will probably wait for Obama.
#31: Fish Farming Threatens Wild SalmonLice, interbreeding, and contaminants are killing off the species.
#35: Scientists Find the Key to Bringing Dead Zones Back to LifePhosphorus levels can make or break a lake, it turns out.
#37: Shorebird Population Is in Rapid DeclineAustralian and Asian birds are a clear example of population collapse.
#44: The Baffling Bee Die-Off ContinuesColony Collapse Disorder continues its relentless march.
#45: Huge Population of Lowland Gorillas FoundFor once, researchers come up with good news for an endangered species.
#49: Plant Migration Tied to Climate ChangeWhen the going gets hot, vegetation runs for the hills.
#55: Polar Bears (Finally) Make the Endangered Species ListAt long last, the government acknowledges the species is threatened.
#73: Giant Ice Meteors Fall From Clear Skies20-pound chunks of ice falling on a sunny day? It's no urban myth.
#93: Physicists Discover the Source of Earth’s "Mystery Hiss"A strange electromagnetic wave follows the path of sound waves through water.