19K views · 199 reactions | Unveil the greatest discovery in Egypt’s Khufu pyramid in more than 1,000 years. Scanning the Pyramids from Secrets of the Dead is streaming on the PBS Video app for a limited time: to.pbs.org/3rzGInc | PBS | Facebook

22K views · 227 reactions | The mysteries of FIRST CONTACT run deep. The truth is out there. Sign Up now to learn the secrets or take your chances on December 1st when tickets go onsale. | ZEDS DEAD | Facebook

25K views · 620 reactions | The childhood notebook Leopold Mozart used to teach his children, Maria Anna and Wolfgang, how to write and play music is the key to solving two ongoing mysteries: Did Maria Anna contribute to Mozart’s earliest work? And did she, too, compose music? “Mozart’s Sister” premieres TOMORROW, October 9 at 10/9c on PBS. | Secrets of the Dead | Facebook