Will the U.S. megadrought ever end?
For 27 years, the Southwest has been gripped by a historic drought. Scientists think it might be here to stay.By Nikk Ogasa
Big space mirrors could bring Earth on-demand light — and upend our night sky
Reflect Orbital satellites could make the darkest skies look like nighttime in the suburbs. By Lisa Grossman
How the body adapts to extreme heat
New methods could help vulnerable people acclimate to higher temperatures. By Katarina Zimmer
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