This Imposing Concrete Hideout is Where Nazi U-Boats Were Once Built (04:05)

Harrowing World War II Footage of the Allies Bringing Supplies to Malta (03:50)

A Cruise Ship Faces Dangerous Malfunction as it Approaches Port (02:17)

Destroying the Dnieper Dam Sent a Strong Message to the Nazis (03:24)

How Stalin, Churchill & Roosevelt Carved up a Defeated Germany (03:31)

This Machine Creates A Mesmerizing Waterfall Of Pasta Inside The Factory Smithsonian Channel (03:36)

Why Maintenance Crews Have to Work Fast to Check a Ship’s Engines (01:10)

The Martin Luther King, Jr. Memorial Is One of America's Greatest National Monuments (03:04)

We Can't Stop Watching This Egg Separator in Action (04:08)

Unfathomable Cruelty at the Heart of Hitler’s Russian Invasion (02:21)

African-Americans Came out of the Civil War and Ran into Jim Crow (01:48)

This Pepperoni Slicer is Mildly Humorous and Ruthlessly Effective (03:37)

Frederick Douglass Disagreed with the Quakers Trying to Free Him (02:30)

How the U.S. Used Small Patrol Boats to Foil Iranian Mines (03:27)

A Single Male Lemur Stands Up to a Entire Troop of Invaders (03:57)

Only the Higher Ups in Lemur Society Enjoy a Tick-Free Life (02:17)

This 200-Year-Old Tree is a Nesting Location for Woodpeckers (01:33)

This 19th Century Dresden Museum Received a Careful Makeover (03:58)

Recreating Part of Odysseus’ Journey in a Modern Sailing Boat (01:45)

Play Sessions Indicate Who Will Rise in Lemur Society (03:07)

A Female Bear Tries to Fend off an Aggressive Male Bear (03:24)

Funicular Trains Defy Gravity to Carry Skiers to Resort (03:51)

This Lemur Queen Will Not Let Her Rivals Go Unpunished (03:43)

The Distinctive Ears of the Eurasian Lynx Are A Mystery (03:33)

How Maritime Expeditionary Security Force Boat Crew Train for Battle (04:12)

Lemurs Love this Sweet Nectar From a Very Unusual Bug (02:17)

This Female Tamarins Hormone Stops Other Females from Mating (03:37)

Why a Hill of Dung is a Male Rhino’s Calling Card (03:02)

Genius or Insane? College Campus Built in a Florida Swamp (04:00)

Doris Miller went from Mess Attendant to a Hero of Pearl Harbor (03:57)

These Lemurs Have Found a Way to Scam Tortoises (03:42)

Why the Audain Art Museum is Built on 16-foot Legs (03:27)