S46 E10: Lost Viking Army

Inside the Search for Planet Nine

The Evidence for Planet Nine’s Existence

The 170-Year Search for a Planet Beyond Neptune

This Cute Robot Uses Sophisticated AI to Help Teach Kids

S46 E10: Who Was This High-Status Viking Warrior?

S46 E10: Why Did These Vikings' Bones Appear Older Than They Are?

S46 E9: Milking a Horse is Harder than You Think

S46 E8: Residents Flee Paradise During the Camp Fire