Dr. Jeremy Shakun and his group's research reconstructing past episodes of permafrost thaw from Arctic cave deposits is featured in the NOVA documentary "Polar Extremes". The film traces the dramatic ...

New discoveries reveal how the ancient metropolis of Angkor was built. Deep in the Cambodian jungle lie the ruins of Angkor, a marvel of urban engineering and seat of the once-mighty Khmer Empire. New ...

This intimate look at the design, building, and operation of the ISS airs on PBS Nov. 5 and Nov. 12. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...