Stunned scientists find FISH beneath 2,400ft-thick Antarctic ice sheet - and they could be getting energy from Earth's core
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Discovery made after drilling a small
hole through the Ross Ice Shelf
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Scientists spotted the sea creatures
in water just 33ft (10 metres) deep
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Small pink fish had organs that
showed through translucent bodies
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Chemical energy from inside Earth's
interior, rather than sunlight, could be sustaining bacteria and other microbes
which the fish feed on.
By ELLIE
ZOLFAGHARIFARD FOR DAILYMAIL.COM
PUBLISHED:
20:31 GMT, 22 January 2015 | UPDATED: 08:14 GMT, 23 January 2015
Incredibly-resilient
fish have been found living in perpetual darkness beneath a 2,430ft (740 metre)
thick sheet of Antarctic ice.
Stunned
scientists made the discovery after drilling a small hole through the Ross Ice
Shelf, which covers an area the size of France.
They spotted
the sea creatures in an area of remote seawater 33ft (10 metres) deep, sealed
between the ice sheet and the seafloor.
Resilient fish have been found living in darkness beneath a 2,430ft
(740 metre) thick sheet of Antarctic ice
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'I'm
surprised,' Ross Powell, a glacial geologist from Northern Illinois University
told Douglas Fox at Scientific American.
'You get the
picture of these areas having very little food, being desolate, not supporting
much life.'
The discovery
of fish in waters -2°C and perpetual darkness poses new questions about the
ability of life to thrive in extreme environments.
The
expedition had initially wanted to analyse the stability of the Whillans Ice
Stream, which is one of about a half-dozen large, fast-moving rivers of ice
pouring from the West Antarctic.
When ice
drillers from the University of Nebraska-Lincoln peered beneath the region,
they initially didn't believe it could hold life.
But over
several hours, they spotted 20 to 30 fish and lowered a camera into the area to
capture their discovery.
The fish had
a bluish-brownish-pinkish, were roughly 15cm long with internal organs showing
through translucent bodies.
'It was clear
they were a community living there,' Proessor Powell says, 'not just a chance
encounter.'
The team
encountered two other types of smaller fish - one black and another orange.
They also found red, shrimp crustaceans, as well as some other marine
invertebrates.
Researchers
suspect one source of food for the fish is plankton which can be grown in the
waters of the Ross Sea and then swept under the ice shelf over a period of six
or seven years.
Chemical
energy from inside interior, rather than sunlight, could also be sustaining
bacteria and other microbes which the fish feed on.
The team are
currently in the process of analysing the fish to understand more about their
species.
'I have been
investigating these types of environments for much of my career, and although I
knew it would be difficult, I had been wanting to access this system for years
because of its scientific importance,' said Professor Powell.
'Findings
such as these - gaining an understanding of the ice sheet dynamics and its
interaction with ocean and sediment, as well as establishing the structure of
its ecosystem - are especially rewarding. It's a big pay-off in delayed
gratification.'
NEW SPECIES OF SULPHATE BREATHING BUG FOUND DEEP UNDER OCEAN
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Two
miles below the surface of the ocean, researchers have discovered new
microbes that 'breathe' sulphate.
The
microbes, which have yet to be classified and named, exist in massive
undersea aquifers — networks of channels in porous rock beneath the ocean
where water continually churns, researchers say.
About
one-third of the Earth's biomass is thought to exist in this largely
uncharted environment.
'It
was surprising to find new bugs, but when we go to warmer, relatively old and
isolated fluids, we find a unique microbial community,' said Alberto Robador,
of USC Dornsife College of Letters, Arts and Sciences, who led the study.
Sulphate
is a compound of sulfur and oxygen that occurs naturally in seawater. It is
used commercially in everything from car batteries to bath salts and can be
aerosolised by the burning of fossil fuels, increasing the acidity of the
atmosphere.
Microbes
that breathe sulphate - that is, gain energy by reacting sulfate with organic
(carbon-containing) compounds - are thought to be some of the oldest types of
organisms on Earth.
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Written by Rebeca Mees
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