White snow, twinkling lights, brass menorahs, Kwanzaa unity cups and a red-and-green potted poinsettia centered on a table.

But for every off-putting ancient hygiene practice, there are countless others that don’t sound so bad. Ancient Egyptians ...

Seoul’s Gwanghwamun Plaza, Olympic Park, Seonyudo Park, Yeouido Saetgang Ecological Park, Gyeongchun Line Forest Path, ...

A five-element ceramic aerogel compresses by 98% and recovers its shape from cryogenic to 1500 degrees C temperatures, ...