1933

Mr and Mrs Spicer describe a large, blob-shaped animal in the waters of  Loch Ness, seen bounding across the road in front of their car. It triggers interest in Nessie and is covered by the national newspapers.

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Ivan Sanderson (1911-1973)

This Scottish biologist worked with Bernard Heuvelmans to devise many ideas about cryptids.

He travelled widely in pursuit of animals and wrote a lot of books.

Read more about the hunt for the Loch Ness Monster:

Bernard Heuvelmans (1916-2001)

© Getty Images
© Getty Images

Heuvelmans was the main proponent of cryptozoology. He wrote books and articles, and devised a number of ideas on the evolution of cryptids.

1958

Heuvelmans publishes the English version of his book, On The Track Of Unknown Animals. It makes the case for Yetis and others as genuine animals.

Bernard Heuvelman ©˙ Getty Images
Bernard Heuvelmans ©˙ Getty Images

Tim Dinsdale (1924-1987)

This aeronautical engineer achieved fame for his passionate interest in the Loch Ness Monster. He went in search of it on numerous occasions, with the intention of filming it.

1967

At Bluff Creek, California, Roger Patterson and Bob Gimlin film a large biped who matches Bigfoot descriptions. Debate rages over the film’s authenticity.

Roger Patterson and Bob Gimlin's video of the alleged yeti © Getty Images
Roger Patterson and Bob Gimlin’s video of the alleged Bigfoot © Getty Images

1972

Underwater photos taken at Loch Ness seemingly depict huge, diamond-shaped flippers.

Flipper © Getty Images
Flippin’ heck! © Getty Images

Confidence in Nessie’s existence is so high that two experts publish a scientific name for the beast: Nessiteras rhombopteryx.

Michel Meurger (1946-)

This folklorist argues that our ideas about monsters are continuations of folk stories. Creature sightings, he explains, are always interpreted within a ‘cultural landscape’.

1982

Heuvelmans’ International Society of Cryptozoology is formed.

It encourages an evidence-led, sceptical approach to monster sightings, but also attracts weird, scientifically dubious claims.

It folds in 1998 due to financial problems.

Adrian Shine (1949-)

© Peter Jolly / REX / Shutterstock
Adrian Shine © Peter Jolly / REX / Shutterstock

This scientist is a leading expert on Loch Ness, its history, ecology and biology, as well as being a noted sceptic.

He has led numerous expeditions, including Operation Deepscan, and has tested many ideas about Nessie’s existence.

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