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…is the opening track on Led Zeppelin’s self-titled debut album from 1969. The song was a difficult experiment in some respects – a lead guitar solo with a swirling effect, sixteenth-note triplets on a single kick drum, and busy riffs on a bass guitar. Riding on these sound waves, Robert Plant tells of a few instances from his youth that depict how he has had his share of times both good and bad.

As regional temperatures continue to rise, vegetation in the Southwest also seems to be having its share of good times and bad times. (Read More)

Scientists are astonished by how fast Arctic sea ice is melting. Previous estimates called for the Arctic to be ice-free in the summer in 30-40 years. After this year’s astounding record melt, however, scientists are now thinking the Arctic may be completely ice-free in the summer by the end of the decade! (Read More)

Freshwater is a precious resource, especially in the arid and drought-prone Southwest. But what you may not know is that the biggest user of freshwater in the U.S. is not our everyday needs, or even farms, but power plants. What’s more, although 99 percent of those withdrawals nationwide were from surface water, in the Southwest, surface water is relatively scarce and thermoelectric power plants have been forced to use groundwater, which then raises concerns over aquifer depletion. (Read More)