Universe Today » Astrobiology

Mars Explorers May Use AI to Become 'Cyborg Astrobiologists'

Nicholos Wethington — Wed, 04 Nov 2009 21:46:04 +0000

Ever heard of a 'Cyborg Astrobiologist'? Probably not. But I bet you'll want to be one after learning that future exploration of Mars (and other planets, for that matter) may employ the use of artificial intelligence integrated into spacesuits to enhance the ability of astronauts in taking scientific data while exploring. The AI assistance could help future astronauts exploring planets to recognize differences in their surroundings as being due to the presence of life. Does this sound like something from 50 years from now? Well, a prototype model has already been tested, and has shown the principle behind this idea to be sound.

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Post tags: Astrobiology, Exploration, Mars

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Bacteria Could Survive in Martian Soil

Nicholos Wethington — Fri, 30 Oct 2009 16:57:02 +0000

Multiple missions have been sent to Mars with the hopes of testing the surface of the planet for life – or the conditions that could create life – on the Red Planet. The question of whether life in the form of bacteria (or something even more exotic!) exists on Mars is hotly debated, and still requires a resolute yes or no. Experiments done right here on Earth that simulate the conditions on Mars and their effects on terrestrial bacteria show that it is entirely possible for certain strains of bacteria to weather the harsh environment of Mars.(...)
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Organic Molecules Detected in Exoplanet Atmosphere

Nancy Atkinson — Tue, 20 Oct 2009 16:10:24 +0000

The basic chemistry for life has been detected the atmosphere of a second hot gas planet, HD 209458b. Data from the Hubble and Spitzer Space Telescopes provided spectral observations that revealed molecules of carbon dioxide, methane and water vapor in the planet's atmosphere. The Jupiter-sized planet – which occupies a tight, 3.5-day orbit around a sun-like star — is not habitable but it has the same chemistry that, if found around a rocky planet in the future, could indicate the presence of life. Astronomers are excited about the detection, as it shows the potential of being able to characterize planets where life could exist.
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Post tags: Astrobiology, Extrasolar Planets

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Where Could Humans Survive in our Solar System?

Nancy Atkinson — Fri, 16 Oct 2009 14:51:00 +0000

If humans were forced to vacate Earth, where is the next best place in our solar system for us to live? A study by the University of Puerto Rico at Arecibo has provided a quantitative evaluation of habitability to identify the potential habitats in our solar system. Professor Abel Mendez, who produced the study also looked at how the habitability of Earth has changed in the past, finding that some periods were even better than today.
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Searching for Life As We Don't Know It

Nancy Atkinson — Fri, 18 Sep 2009 00:03:59 +0000

When discussing the possibility of finding life on other worlds, we usually add the phrase "life – as we know it." But we've been surprised at exotic forms of life even on our own world and we need figure out how life might evolve elsewhere with foreign biochemistry in alien environments. Scientists at a new interdisciplinary research institute in Austria are working to understand exotic life and how we might find it.
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A New "Drake" Equation for Potential of Life

Nancy Atkinson — Thu, 17 Sep 2009 00:09:39 +0000

An image showing microbes living in sandstone in Antarctica (credit: C Cockell)

The famed Drake equation estimates the number of technologically advanced civilizations that might exist in our Galaxy. But is there a way to mathematically quantify a habitat’s potential for hosting life?
“At present, there is no easy way of directly comparing the suitability of different environments as a habitat for life" said Dr. Axel Hagermann, who is proposing a method to find a "habitability index" at the European Planetary Science Congress.
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Amino Acid Found in Stardust Comet Sample

Nancy Atkinson — Mon, 17 Aug 2009 19:38:30 +0000

NASA scientists studying the comet samples returned by the Stardust spacecraft have discovered glycine, a fundamental building block of life. Stardust captured the samples from comet Wild 2 in 2004 and returned them to Earth in 2006. "Glycine is an amino acid used by living organisms to make proteins, and this is the first time an amino acid has been found in a comet," said Dr. Jamie Elsila of NASA's Goddard Space Flight Center. "Our discovery supports the theory that some of life's ingredients formed in space and were delivered to Earth long ago by meteorite and comet impacts."
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Sun, Earth Are Unlikely Pair to Support Life

Anne Minard — Mon, 10 Aug 2009 20:13:19 +0000

The violent youth of solar proxies. Courtesy of IAU.

We don't know how lucky we are — really.

We know the interaction between Earth and the Sun is a rarity in that it allowed life to form. But scientists working to understand the possibility that it could have happened elsewhere in the Universe are still far from drawing conclusions.

What is becoming clearer is that life probably shouldn't have formed here; the Earth and Sun are unlikely hosts.
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Sub-surface Oceans In Early Comets Suggest Possible Origin of Life

Brian Ventrudo — Thu, 30 Jul 2009 17:48:41 +0000

A new study claims early comets contained vast interior oceans of liquid water that may have provided the ideal conditions for early life to form.

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Ancient Domes Reveal 3.45-billion-year-old Life History

Anne Minard — Fri, 17 Jul 2009 20:27:32 +0000

Rare, paleosurface view of how conical stromatolites would appear if one snorkeled in the shallows of a reef. Credit: Abigail Allwood

Ancient, dome-like rock structures contain clues that life was active on Earth 3.45 billion years ago, according to new research — and the findings could help shed light on life's history on Earth and other planets, including Mars.
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Does Enceladus Harbor a Liquid Ocean? Reasonable Minds Disagree

Anne Minard — Wed, 24 Jun 2009 17:07:18 +0000

Two papers in the journal Nature this week come down on opposite sides of the question about whether Saturn's moon Enceladus contains a salty, liquid ocean.

One research team, from Europe, says an enormous plume of water spurting in giant jets from the moon's south pole is fed by a salty ocean. The other group, led out of the University of Colorado at Boulder, contends that the supposed geysers don't have enough sodium to come from an ocean. The truth could have implications for the search for extraterrestrial life, as well as our understanding of how planetary moons are formed.

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Tiny, Deep-Frozen Greenland Bacterium May Hold Extra-Terrestrial Clues

Anne Minard — Mon, 15 Jun 2009 15:25:37 +0000

Courtesy of Pennsylvania State University

Researchers have breathed new life into a bacterium trapped deep under glacial ice in Greenland — for over 120,000 years.

The researchers, who hail from Pennsylvania State University, say the newly discovered bacterium may hold clues as to what life forms might be frozen on other planets.

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So Where Is ET, Anyway?

Brian Ventrudo — Fri, 05 Jun 2009 21:01:26 +0000

While having lunch with colleagues at Los Alamos National Labs in 1950, physicist Enrico Fermi mused about the likelihood of intelligent life existing elsewhere in the Universe. Fermi, one of the most astute scientists of his day, thought the size and age of the Universe means many advanced civilizations should have already colonized the galaxy, just as humans colonized and explored the Earth. But if such galaxy-wide extraterrestrial civilizations exist, he wondered, where are they?

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Without Nickel, Life on Earth Could Finally Breathe

Anne Minard — Thu, 09 Apr 2009 18:54:20 +0000

Caption: Banded iron formations like this from northern Michigan contain evidence of a drop in dissolved nickel in ancient oceans. Credit: Carnegie Institution for Science

Researchers have long puzzled over why oxygen flourished in Earth's atmosphere starting around 2.4 billion years.

Called the "Great Oxidation Event," the transition "irreversibly changed surface environments on Earth and ultimately made advanced life possible," said Dominic Papineau of the Carnegie Institution's Geophysical Laboratory.

Now, Papineau has co-authored a new study in the journal Nature, which reveals new clues to the mystery in ancient sedimentary rocks.

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Would Life Form Differently Around Cool Stars?

Nancy Atkinson — Tue, 07 Apr 2009 20:29:34 +0000

"Life as we know it" seems to be the common caveat in our search for other living things in the Universe. But there's also the possibility of life "as we don't know it." A new study from NASA's Spitzer Space Telescope hints that planets around stars cooler than our sun might possess a different mix of potentially life-forming, or "prebiotic," chemicals. While life on Earth is thought to have arisen from a hot soup of different chemicals, would the same life-generating mix come together around other stars with different temperatures? (And should we call it 'The Gazpacho Effect?') "Prebiotic chemistry may unfold differently on planets around cool stars," said Ilaria Pascucci, lead author of the new study.
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Molecules From Space May Have Affected Life On Earth

Nancy Atkinson — Tue, 17 Mar 2009 17:59:08 +0000

Murchison meteorite.

A decade ago researchers analyzed amino acids from space, brought to Earth in meteorite which landed in Australia, finding a prevalence of “left-handed” amino acids over their “right-handed” form. Now, a new study of dust from meteorites supports this finding, and offers new clues to a long-standing mystery about how life works on its most basic, molecular level. “We found more support for the idea that biological molecules, like amino acids, created in space and brought to Earth by meteorite impacts help explain why life is left-handed,” said Dr. Daniel Glavin of NASA’s Goddard Space Flight Center in Greenbelt, Md. “By that I mean why all known life uses only left-handed versions of amino acids to build proteins.”
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Indian Balloon Experiment Nets Three New Bacteria

Anne Minard — Mon, 16 Mar 2009 18:12:03 +0000

Credit: ISRO

Indian scientists flying a giant balloon experiment have announced the discovery of three new species of bacteria from the stratosphere.

In all, 12 bacterial and six fungal colonies were detected, nine of which, based on gene sequencing, showed greater than 98 percent similarity with reported known species on earth. Three bacterial colonies, however, represented totally new species. All three boast significantly higher UV resistance compared to their nearest phylogenetic neighbors on Earth.

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Arizona Scientist: We Could All Be Martians

Anne Minard — Sat, 21 Feb 2009 21:43:16 +0000

As long as we’re still pondering human origins, we may as well entertain the idea that our ancestor microbes came from Mars.

And Jay Melosh, a planetary scientist from the University of Arizona in Tucson, is ready with a geologically plausible explanation.

Meteorites.

"Biological exchange between the planets of our solar system seem not only possible, but inevitable," because of meteorite exchanges between the planets, Melosh said. "Life could have originated on the planet Mars and then traveled to Earth."

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More Ancient Hot Springs Discovered on Mars?

Nancy Atkinson — Sat, 14 Feb 2009 21:51:32 +0000

In March 2007, the Spirit rover found a patch of bright-colored soil rich in silica. Scientists proposed water must have been involved in creating the region, and not just water, but hot water. Now, data from retrieved from the Mars Reconnaissance Orbiter (MRO) suggest the discovery of another ancient hot springs region in Vernal Crater in Arabia Terra, an area in the northern hemisphere of Mars that is densely cratered and heavily eroded. The research team says the striking similarities between these features on Mars and hot springs found on Earth provide evidence of an ancient Martian hot-spring environment. On Earth these environments teem with microbial life.
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Large Quantities of Methane Being Replenished on Mars

Nancy Atkinson — Thu, 15 Jan 2009 21:01:03 +0000

Methane has been measured in large quantities in Mars atmosphere over several seasons, meaning Mars is active, either geologically or biologically. "We found methane," said Dr. Geronimo Villanueva from the NASA Goddard Space Flight Center, one member of a team of scientists reporting on their research at a press conference today at NASA Headquarters. "We can measure not only the methane, but where it is coming from and when it is being released." This is the first definitive detection of methane on Mars that includes maps identifying areas of active release. "Mars is active," said Michael Meyers, lead NASA scientist for the Mars Program, "but we don't know if it's because of biology or geology or both."
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Sweet! Galactic Molecule Could Point to Alien Life

Nancy Atkinson — Wed, 26 Nov 2008 13:49:03 +0000

An organic sugar molecule which is directly linked to the origin of life has been detected in a region of our galaxy where habitable planets could exist. Using the IRAM radio telescope in France, an international team of scientists found the molecule in a massive star forming region of space, about 26,000 light years from Earth. “This is an important discovery, as it is the first time glycolaldehyde, a basic sugar, has been detected near a star-forming region where planets that could potentially harbour life may exist,” said Dr. Serena Viti, one of the paper’s authors. Glycolaldehyde can react to form ribose, a key constituent of the nucleic acid RNA, thought to be the central molecule in the origin of life.
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Microbial Life on the Moon?

Nancy Atkinson — Wed, 05 Nov 2008 21:21:44 +0000

One astrobiologist claims the deep, dark craters on the Moon might contain traces of early life from meteorites blasted off the Earth by asteroids billions of years ago. Joop Houtkooper, from the University of Giessen in Germany says studying these craters could reveal clues about the origin and evolution of life on Earth or even contain remnants of life from other planets in the Solar System, such as Mars. Houtkooper is also one of the few scientists who insist that the experiments done by the Viking Mars Landers in the 1970's actually did reveal microbial life in the Martian soil, and earlier this year, Houtkooper predicted microbes could be detected by NASA's Phoenix lander. So, could this new claim about microbes on the Moon be just the latest in a long series of contentious claims, or is Houtkooper onto something?
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Mars Methane Mystery Still Beckons

Nancy Atkinson — Mon, 03 Nov 2008 22:16:52 +0000

We've known about the methane in Mars' atmosphere for over four years now. But we don't know where it is coming from. On Earth, methane is produced from biological agents: rotting vegetation or flatulence from large animals like cows. But, of course, with our extensive explorations of Mars with rovers and high-resolution orbiting cameras, we're fairly sure there are no Martian bovine equivalents chewing cud from the foliage on the Red Planet. Even if life existed in the past on Mars, methane is broken down quite quickly by sunlight, and scientists have calculated that methane should only exist for a few hundred years in the Martian atmosphere. The only possibility is that somehow, either chemically or biologically, the methane is being replaced on a regular basis. And now, two recent reports outlining separate discoveries on Mars make this methane mystery even more intriguing.
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Did Lightning and Volcanoes Spark Life on Earth?

Nancy Atkinson — Mon, 20 Oct 2008 16:04:55 +0000

Maybe the fictional Dr. Frankenstein wasn't so crazy after all. Two scientists have resurrected an old experiment, breathing life into a "dead" notion about how life began on our planet. New analysis shows that lightning and gases from volcanic eruptions could have given rise to the first life on Earth.

"It's alive!"…

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Electrical Activity on Titan Confirmed: The Spark for Life?

Ian O'Neill — Fri, 01 Aug 2008 02:54:16 +0000

Titan not only has an atmosphere it has hydrocarbon lakes, oceans, sand dunes and now research has just been published proving Saturn's moon is sparkling with electrical activity. Scientists are in general agreement that organic molecules, the precursors to life on Earth, are a consequence of lightning in the atmosphere. Now, using data from the Huygens probe that descended through Titan's atmosphere in 2005 and continued transmitting for 90 minutes after touchdown, Spanish scientists have "unequivocally" proven that Titan has electrical storms too. The presence of electrical activity in the atmosphere is causing much excitement as this could mean that organic compounds may be found in abundance on the Titan surface.
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