Scientists discover billions of tons of 'zombie' bacteria inhabits the ground beneath our feet

Barely alive "zombie" bacteria and other life forms are thriving miles below the Earth's surface, scientists...

Posted: Dec 11, 2018 10:48 AM
Updated: Dec 11, 2018 10:49 AM

Barely alive "zombie" bacteria and other life forms are thriving miles below the Earth's surface, scientists have found after a decade of research which changes perceptions of life on our planet.

The discovery of what has been termed a "subterranean Galapagos" was announced by the Deep Carbon Observatory Tuesday, which said many of the lifeforms have lifespans of millions of years.

Bacteria

Life forms

Microscopic life

Science

Celestial bodies and objects

Earth

Planets and moons

Space and astronomy

DCO executive director Robert Hazen said the findings are the "crowning achievement" of the 1,000-strong collective of scientists, who "have opened our eyes to remarkable vistas -- emerging views of life that we never knew existed."

The biomass of the organisms' ecosystem is estimated at 15 to 23 billion metric tonnes (16.6 to 25.4 billion tons), which is hundreds of times greater than that of all human life, and comprises a volume of 2 to 2.3 billion cubic kilometers (480 to 550 million cubic miles) -- almost twice that of all the planet's oceans.

Making use of advances in technology, scientists drilled 2.5 kilometers (1.5 miles) into the seabed and sampled "microbes from continental mines and boreholes more than 5 km deep," a report from the observatory says.

The findings look set to change our ideas about life on Earth and have implications for the likelihood of similar discoveries on other planets.

There are millions of distinct types of bacteria as well as archaea -- microbes with no membrane-bound nucleus -- and eukarya -- microbes or organisms with cells that contain a nucleus and have membrane walls -- living beneath the Earth's surface, the report says, possibly exceeding the diversity of surface life. Around 70% of the planet's bacteria and archaea are now thought to live underground.

"Deep microbes are often very different from their surface cousins, with life cycles on near-geologic timescales, dining in some cases on nothing more than energy from rocks," the report says.

DCO co-chair Mitch Sogin said the discovery was like finding a new Amazon.

"Exploring the deep subsurface is akin to exploring the Amazon rainforest. There is life everywhere, and everywhere there's an awe-inspiring abundance of unexpected and unusual organisms."

The abundance of subsurface life has opened a metaphorical can of worms.

Among the questions that the discovery poses is how the abundant life began, and how it survives and reproduces in extreme conditions.

"Did life start deep in Earth (either within the crust, near hydrothermal vents, or in subduction zones) then migrate up, toward the sun?" the report asks.

"Or did life start in a warm little surface pond and migrate down? How do subsurface microbial zombies reproduce, or live without dividing for millions to tens of millions of years?"

It also asks questions of how this life spreads, and what its main source of energy is.

"How do the absence of nutrients, and extreme temperatures and pressure, impact microbial distribution and diversity in the subsurface?" it asks.

Article Comments

Mason City
Clear
34° wxIcon
Hi: 51° Lo: 32°
Feels Like: 27°
Albert Lea
Clear
36° wxIcon
Hi: 47° Lo: 32°
Feels Like: 32°
Austin
Clear
37° wxIcon
Hi: 47° Lo: 33°
Feels Like: 32°
Charles City
Clear
36° wxIcon
Hi: 48° Lo: 32°
Feels Like: 29°
Rochester
Clear
35° wxIcon
Hi: 45° Lo: 31°
Feels Like: 26°
Rain/mix possible on Wednesday
KIMT Radar
KIMT Eye in the sky

Latest Video

Image

Chris Likes Mom's Ties

Image

Lawmakers tour Rochester

Image

Prepping for National Prescription Drug Take Back Day

Image

NIACC women's basketball season preview

Image

Sports Overtime: highlights from around the area

Image

Honoring entrenpeneurs

Image

Hip Hop with a Message

Image

Dyslexia simulation

Image

Teen driving safety

Image

Chris' PM Weather Forecast

Community Events