Giant crocodiles, aeroplane sized flying predators and ferocious underwater sea monsters feature in this episode of extraordinary animals that have gone extinct.

Music credits:
1. Music by Karl Casey - Melancholic Retrowave Theme No Beat - Technicolor
2. Background Music [Ambient] Gravity Sound - Middle
3. 'This Too Shall Pass' by Scott Buckley - released under CC-BY 4.0. www.scottbuckley.com.au
4. "Soaring" by Kevin MacLeod CC BY 3.0 license
http://creativecommons.org/licenses/b...

Image credits:

Alexego01 - https://www.goodfon.com/

Sarcosuchus in the National Museum of Natural History, Paris - Shadowgate from Novara, ITALY CC BY 2.0 DEED https://creativecommons.org/licenses/...

Size comparison of the largest recorded examples of several crocodilian species (typical sizes in many cases are much smaller):
Sarcosuchus imperator
Deinosuchus hatcheri
Gavialis gangeticus
Crocodylus niloticus
Alligator mississippiensis, and a human.
Matt Martyniuk Dinoguy2
CC BY-SA 3.0 DEED https://creativecommons.org/licenses/...

Comparison of Q. northropi with a Cessna 172 light aircraft. - The Nature Box
CC BY-SA 4.0 https://creativecommons.org/licenses/...

Quetzalcoatl - Mark Cartwright CC BY-SA 4.0 https://creativecommons.org/licenses/...

Size comparison of a human to Q. northropi (green) and Q. lawsoni (blue) Matt Martyniuk (Dinoguy2), Mark Witton and Darren Naish CC BY 3.0 https://creativecommons.org/licenses/...

Life restoration of a group of giant azhdarchids, Quetzalcoatlus northropi, foraging on a Cretaceous fern prairie - Mark Witton and Darren Naish CC BY 3.0 DEED https://creativecommons.org/licenses/...

Sachicasaurus vitae by Johnson-Mortimer CC BY 3.0 DEED https://creativecommons.org/licenses/...

Liopleurodon by Johnson-Mortimer CC BY 3.0 DEED http://creativecommons.org/licenses/b...

Ophthalmosaurus, Cryptoclidus var.2 ABelov2014 CC BY 3.0 DEED http://creativecommons.org/licenses/b...

Restoration of P. funkei
ДиБгд CC BY-SA 4.0 https://creativecommons.org/licenses/...

Fossil of Liopleurodon, an extinct reptile - Took the picture at Museum of Paleontology, Tuebingen - Ghedoghedo CC BY-SA 3.0 https://creativecommons.org/licenses/...

Basal Pistosauria, like Augustasaurus, already bore a strong resemblance to Plesiosauria. - Nobu Tamura CC BY 3.0 https://creativecommons.org/licenses/...

Pliosaurus brachydeirus - Dmitry Bogdanov CC BY-SA 3.0 https://creativecommons.org/licenses/...

Liopleurodon rossicus, Dinosaurium exhibition, Prague, Czech Republic - Radim Holiš CC BY-SA 3.0 CZ DEED
https://creativecommons.org/licenses/...