46 - 1Pluto and Beyond Jan. 02, 2019
46 - 2Einstein's Quantum Riddle Jan. 09, 2019
46 - 3Kïlauea: Hawai'i on Fire Jan. 23, 2019
46 - 4Decoding the Great Pyramid Feb. 06, 2019
46 - 5Rise of the Rockets Feb. 13, 2019
46 - 6The Next Pompeii Feb. 20, 2019
46 - 7Saving the Dead Sea Apr. 24, 2019
46 - 8Inside the Megafire May. 08, 2019
46 - 9First Horse Warriors May. 15, 2019
46 - 10Lost Viking Army May. 22, 2019
46 - 11Back to the Moon Jul. 10, 2019
46 - 12The Planets: Inner Worlds Jul. 24, 2019
46 - 13The Planets: Mars Jul. 24, 2019
46 - 14The Planets: Jupiter Jul. 31, 2019
46 - 15The Planets: Saturn Aug. 07, 2019
46 - 16The Planets: Ice Worlds Aug. 14, 2019
46 - 17Why Bridges Collapse Oct. 16, 2019
46 - 18Look Who's Driving Oct. 23, 2019
46 - 19Rise of the Mammals Oct. 30, 2019
46 - 20Dead Sea Scroll Detectives Nov. 06, 2019
46 - 21Decoding Da Vinci Nov. 13, 2019
46 - 22The Violence Paradox Nov. 20, 2019
46 - 23Animal Espionage Nov. 27, 2019