TUESDAY, JANUARY 17

Behind the Mysteries: "Rebuilding Stonehenge" at 9P et/pt (two hours)

Follow a team of experts as they set out on a daunting task -- to
rebuild the largest and most famous prehistoric stone circle
exactly as it was 4,000 years ago and solve the mystery of
this ancient enigma.

Watch a preview.

http://ng.chtah.com/a/tBDzTCoASJ4TXAcDRQaAOOv6R.ASJ-ROaP/ngs4

Behind the Mysteries: "Moon Mysteries" at 8P et/pt

The moon creates our seasons, our days and nights, our tides. Can
it trigger natural disasters like earthquakes and volcanic
eruptions? Does a full moon influence human behavior? NGC
puts a tightly-focused lens on the mysteries of the moon.