Every year, from the peat-stained depths of Scotland’s Loch Ness and the misty cedar forests of the Pacific Northwest to the remote river basins of the Congo, dedicated expeditions head into the wilderness armed with sonar arrays, thermal trail cameras, and environmental DNA (eDNA) water filters in pursuit of creatures that mainstream biology says do not exist. Known as cryptozoology—literally “the study of hidden animals”—this controversial borderland between folkloristics and field zoology seeks to track down cryptids: animals reported in local indigenous traditions and eyewitness sightings that have not yet been verified by a physical type-specimen in a museum.
Bernard Heuvelmans, Ivan Sanderson, and the Okapi Precedent
Although travelers have hunted monsters since antiquity, modern cryptozoology was founded in the 1940s and 1950s by two formally trained scientists: the Belgian-French zoologist Dr. Bernard Heuvelmans (whose landmark 1955 book On the Track of Unknown Animals sold over a million copies) and the Scottish-born biologist Ivan T. Sanderson, who coined the term.
Why did Heuvelmans believe that large, unknown animals were still hiding on twentieth-century Earth? Because twentieth-century zoology had already been humbled several times when “mythical native folklore beasts” turned out to be 100% real flesh-and-blood animals:
- The Mountain Gorilla (1902) and Giant Panda (1869): For centuries, European scientists dismissed African travelers’ tales of giant hairy chest-beating forest ape-men as myths until Captain Robert von Beringe encountered real mountain gorillas in 1902.
- The Okapi (1901): When Indigenous Mbuti people in the Congo rainforest told British explorer Henry Morton Stanley about a shy, zebra-striped forest horse-giraffe called the atti, European zoologists laughed—until Sir Harry Johnston sent back a complete skull and skin of the Okapi in 1901, the official emblem of the International Society of Cryptozoology!
- The Coelacanth (1938): Assumed by every paleontologist on Earth to have gone completely extinct alongside the dinosaurs sixty-six million years ago, a living, five-foot blue Coelacanth lobe-finned fish was hauled up in a fisherman’s net off South Africa in December 1938, followed by the discovery of the Komodo Dragon (1910), the Megamouth Shark (1976), and Vietnam’s Saola (“Asian Unicorn,” 1992).
The Big Three Cryptids: Nessie, Bigfoot, and Mokele-Mbembe
While thousands of local cryptids populate regional folklore, three iconic investigations have dominated the field for nearly a century:
- The Loch Ness Monster (“Nessie,” Scotland): Although the sixth-century biography of Saint Columba mentions the saint driving away a “water beast” in the River Ness in 565 AD, global “Nessie-mania” erupted in 1933 after a new lakeside road was blasted along the twenty-three-mile-long, 750-foot-deep glacial trench of Loch Ness and a London surgeon published the iconic 1934 “Surgeon’s Photograph” showing a long plesiosaur-like neck rising from the ripples. While the 1934 photo was later exposed as a toy submarine hoax and a comprehensive 2019 environmental DNA (eDNA) water survey led by geneticist Neil Gemmell found zero reptile or prehistoric plesiosaur DNA in the loch, the survey did find massive amounts of European Eel DNA—suggesting giant, thick-bodied eels alongside boat wakes and floating logs may explain centuries of sightings!
- Bigfoot / Sasquatch and the Yeti: Rooted in Indigenous Coast Salish traditions of wild forest men (Sasq’ets) and Himalayan Sherpa accounts of the Meh-Teh (Yeti), North American Bigfoot hunting exploded in 1958 after huge footprints were cast in Bluff Creek, California, and Roger Patterson and Bob Gimlin filmed the famous 1967 16mm footage of a striding female figure (“Patty”). Cryptozoologists like Grover Krantz and Jeff Meldrum argued such hominids could be surviving descendants of Gigantopithecus blacki—a real, ten-foot-tall Pleistocene Asian ape known from fossil teeth and jaws—though every hair sample tested by peer-reviewed geneticists to date has matched bears, wolves, cows, or humans.
- Mokele-Mbembe and the Thylacine: In the swampy Likouala basin of the Republic of the Congo, expeditions have searched for Mokele-Mbembe (“One Who Stops the Flow of Rivers”), while in Australia’s rugged Tasmanian wilderness, trackers use automated camera traps hoping to prove that the marsupial Tasmanian Tiger (Thylacine)—officially declared extinct in 1936—still survives in isolated valleys.
Why the Search Endures in an Age of Satellites
Even as mainstream biologists point out that a breeding population of fifty-foot aquatic reptiles or eight-foot primates requires hundreds of individuals that would inevitably leave behind roadkill carcasses, bones, and fossilized teeth, psychologists and historians of science recognize why cryptozoology captures the human heart. In a mapped, satellite-monitored world where wilderness shrinks every year, the search for the Loch Ness Monster and Bigfoot keeps alive the romantic hope that planet Earth still holds untamed corners and big surprises waiting just beyond the edge of the trees.
