Humans Evolve Deep Diving Abilities
Is it possible that small groups of humans have evolved special abilities? For example, some people can hold their breath underwater for a few minutes. But a group of people called the Bajau takes free diving to the extreme, staying underwater for as long as 13 minutes at depths of around 200 feet.
These nomadic people live in waters winding through the Philippines, Malaysia, and Indonesia, where they dive to hunt for fish or search for natural elements that can be used in crafts.
Now, a study in the journal Cell offers the first clues that a DNA mutation for larger spleens gives the Bajau a genetic advantage for life in the deep.
Previous work showed that in seals, marine mammals that spend much of their life underwater, spleens are disproportionately large. Study author Melissa Llardo from the Center for Geogenetics at the University of Copenhagen wanted to see if the same characteristic was true for diving humans. During a trip to Thailand, she heard about the sea nomads and was impressed by their legendary abilities.
She also took data from a related group of people called Saluan, who live on the Indonesian mainland. Comparing the two samples back in Copenhagen, her team found that the median size of a Bajau person's spleen was 50 percent bigger than the same organ in a Saluan individual.
The researchers also stumbled across a gene called PDE10A, which is thought to control a certain thyroid hormone, in the Bajau but not the Saluan. In mice, the hormone has been linked to spleen size, and mice that are manipulated to have lower amounts of the hormone have smaller spleens.
Llardo theorizes that over time, natural selection would have helped the Bajau, who have lived in the region for a thousand years, develop the genetic advantage.
Growing up in the 1960's, this seems like science fiction to me. I distinctly remember an episode of the sixties sf series Voyage to the Bottom of the Sea in which a scientist decides that the best way to breathe underwater is to give himself gills. Alas, once equipped with gills, and fully acclimated to life in the sea, Dr. Jenkins and his associate lie in wait outside the submarine Seaview, converting every diver who emerges from the ship into mermen.
(From The Amphibians - aired Mar-08-1965)
Scroll down for more stories in the same category. (Story submitted 4/12/2018)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 0 )
Related News Stories -
Oil from Algae - Can It Be Done?
'We dump everything that's waste into the tanks, pump the oil off the top.' - Hal Clement, 1950.
Amazing 'Hybrid' Solar-Powered Sea Slug Does Photosynthesis
Thank goodness for Star Trek.
Should You Submit Your DNA To A Database?
Consumer DNA services are often inaccurate.
Humans Evolve Deep Diving Abilities
Sounds like '60s sci-fi to me.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Musk Declares Tesla Supercharger Capacity Will Double By Next Year
'Recharge the batteries... in almost every town and village...'
Drywall Robot Looking For Sheetrock
Sheetrockers have sure changed since my day.
Ford's Autonomous Cabs 'Transportation As A Service'
'He was glad to crawl into his autocab and close the cover.'
Sex In Driverless Cars?
'...admirable for petting.'
Amazing Kepler Space Telescope Decommissioned By NASA
'Thus it came about that the search for a planetiferous sun... was not unduly prolonged...'
ODYSSEUS Solar-Powered Stratospheric Plane Flies Forever
'The planes flew continuously, twenty-four hours a day...'
Augmented and-or Virtual Reality Shoes From Google
'The auto-treadmill's bumps and gullies matched whatever terrain the goggles showed me...'
Soon, Your Tesla Will Follow You Like A Pet
'... follow him as faithfully as a well-trained hound.'
Chinese Watrix Gait Recognition Watching You Always
'... those pesky gait-recognition cameras.'
FlexPai Foldable Phone By Royole
'...A paper thin polycarbon screen unfurled.'
Bioreactor Helps Legless Frogs Get Their Jump Back
'An alien drug... Used by an insect race... It can repair bones and organs. It can grow new tissue."
Oh Yes, We're Building The Rotating Tower In Dubai
'Give me an old-fashioned tetragon on a central pivot every time.'
Xinhua AI Anchor Puts CGI Face To Automated News
'...a congeries of software agents.'
Wirewax Watching You Watch, Adjusting Your Experience
'He adjusted the n, the r and b knobs, and hopefully anticipated a turn for the better...'
LawGeex AI Beats 20 Top Lawyers
'The Law Society has strict rules on the use of pseudo-intelligent software - terrified of putting... its members out of work.'
ROAM Robotics Skiing Exoskeleton
'The real genius in the design is that you don't have to control the suit; you just wear it...'
More SF in the News Stories
More Beyond Technovelgy science news stories