Mother Took on Air Polluters in Her Local Neighborhood (03:28)

This Farm Helps Make 2 Million Potato Chip Packets a Day (02:47)

The Manubalista Was Rome’s Secret Weapon in Ancient Britain (02:39)

This Monster Tamping Machine? A Locomotive’s Best Friend (02:41)

A Vervet Monkey Befriends Some Hostile Dogs (03:28)

This Orphan Zebra and Two Dalmatians Are Close (03:54)

The Secret Is in the Space Suit (04:07)

Drive The Perseverance Rover in Smithsonian Channel's New "Mission to Mars AR" Phone App (01:03)

How the Meaning of Thanksgiving Has Changed (02:31)

Before the Pilgrims Arrived, Europeans Had Raided and Devastated Native Communities for Years (02:43)

The Connections Between the Thanksgiving Story and Westward Expansion (03:12)

Manta Rays Are Smart Enough to Give These Fish Instructions (02:19)

This Alpha Male Macaque's Leadership Has Paid Dividends (02:12)

This Dog Is Trained to Sniff Out and Locate Whale Poop (05:37)

The Intelligence Failures That Could Have Averted JFK's Death (02:31)

A Railway Alternative to the Panama Canal Is Much Cheaper (03:27)

These Traditional British Sweets Have the Best Names (02:58)

This Lithuanian Depot Has an Innovative Approach to Train Repair (03:14)

This Sustainable Offshore Cobia Fish Farm Sells Millions (03:34)

An Unexpected Friendship Between This Grumpy Cat and Bubbly Parakeet (03:22)

This Duck’s Unusual Upbringing Explains His Fear of Water (03:01)

Was the Deepwater Horizon Disaster Preventable? (03:55)

In 1960, a Would-Be Assassin Tracked JFK to His Holiday Home (03:09)

How They Get Chocolate to Cling Perfectly to a Toffee Finger (01:39)

Before 9/11, the World Trade Center Was Bombed by Terrorists in 1993 (02:17)

This Object in History: Fernandomania (05:27)

This Ancient Egyptian Mega-Tomb Is the Largest of Its Kind (03:38)

This Baby Monkey Loves His Favorite Foods (03:53)

This Object in History: Nintendo (05:27)

This Truffle Dog Is Facing a Really Challenging Truffle Hunt (04:30)

The California Raisins' Smashing Advertising Success (06:43)

Meet the Majestic Giant Manta Ray (02:49)