Craig Ferguson takes a look at some small, medium and large-sized shark teeth. Will he have second thoughts about getting in the water with them?

Shark After Dark's Taryn Southern and Bob the Shark meet Sharkzilla, a Megalodon-sized mechanical shark, at VidCon. They're joined by Tory from MythBusters.

On Shark After Dark, Bob the Shark heads to SeaWorld to meet with the humans (don't worry, Bob doesn't bite) and his archenemies: the dolphins.

On Shark After Dark, Blimp from "Voodoo Sharks" shows off his unique Shrimp Dance.

Tickle from Moonshiners shares some of his favorite concoctions with Shark After Dark host Josh Wolf, and Bob the Shark feels left out.

On the final night of Shark After Dark, Bob the Shark faces off against his "alien shark" cousin Blorb the Shark, aka the Tom Green of the Ocean.

Bob the Shark and David "The Hoff" Hasselhoff sing the Shark After Dark theme song (now huge in Germany) and has a shark-to-shark chat with Sharkzilla.

On Shark After Dark, host Josh Wolf tosses to a clip of Ian Ziering in Sharknado... but no wait, it's actually a clip of Ian dancing at Chippendales!

On Shark After Dark, Taryn asks Bob the Shark and Dominic Monaghan questions from our Twitter audience. #SharkAfterDark

Kari, Grant and Tory from MythBusters unveil Sharkzilla, an INSANELY AWESOME replica of a Megalodon, a giant ancient shark that measured over 50 feet in length.

Was the ancient shark Megalodon capable of biting an entire whale's head off? Watch our test chomp to find out if this is even remotely possible.

On Shark After Dark, actress Tara Reid ponders how whale sharks are made (whale shark = whale shark?) and other shark mysteries...

On Shark After Dark, Bob the Shark returns and somehow ends up on a plane with actress Tara Reid and actor Ian Ziering...

Watch the best of Bob the Shark from Shark After Dark, Discovery's first live late-night talk show, on Sunday, August 4.

On Shark After Dark, actress Alison Sweeny shares the shocking tale of a reality contestant's fear of sharks.

Shark After Dark host Josh Wolf faces his fears and goes diving with sharks, along with his pal television personality Carrie Keagan.

Dumping in oceans has become an underwater epidemic. Everything from license plates to a full suit of armor has been found in the belly of a shark.

This haunting new species of ghost shark was discovered for the first time on Alien Sharks: Return to the Abyss, part of the Shark Week 2014 lineup.

Can the Hammerhead Shark really detect magnets? Les Stroud puts this urban legend to the test.

Great white sharks have a warm core temperature, which allows them to be more energetic predators in colder waters. From Shark Week 2016's "Wrath of a Great White Serial Killer."

What are your favorite moments from Shark Week? Your favorites from Discovery take a look back at the past quarter of a century of Shark Week.

In today's countdown, Jeff Kurr reveals which Shark Week moment made it to fifth place!

Scientists are discovering how unique nanobodies found in sharks and llamas may help treat cancer and other deadly diseases in humans.

The scientists behind Phelps Vs. Shark reveal how they made the greatest swimmer of all time even faster.

Sharks get aggressive when mating season arrives.

Popular physicist Derek Muller discusses shark misconceptions, like they myth that sharks don't get cancer, on Shark After Dark, part of the Shark Week 2014 lineup.

Sharks very rarely attack people, but why do you think they do on occasion? Your favorites from Discovery take our Shark Week pop quiz.

Bob the Shark get his own theme song and visits the beach for shark trivia. Watch Bob the Shark highlights from night 2 of Shark After Dark 2014.

From electrical detection to ninja-like stealth, sharks are full of superpowers we humans could only dream of wielding.

Ultrasound reveals that a pregnant tiger shark is carrying 20 well-developed shark pups! From Shark Week 2016's "Tiger Beach."

Hear from actress January Jones explain why sharks need our help more than ever.

In today's countdown, Jeff Kurr reveals which Shark Week moment made it to fourth place!