Astrobiology News

An artist’s impression of a water-rich exoplanet with an oxygen-rich atmosphere orbiting a red dwarf star. Image credit: NASA’s Goddard Space Flight Center / Friedlander-Griswold.

Astronomers Have New Way to Spot Oxygen in Atmospheres of Exoplanets

Jan 7, 2020 by News Staff

Since exoplanets are so far away, astronomers cannot look for signs of extraterrestrial life by visiting these distant worlds. Instead, they must use a...

An artist’s impression of a terraformed Mars. Image credit: Daein Ballard / CC BY-SA 3.0.

High-Oxygen Exoplanetary Atmospheres More Common than Thought, Study Suggests

Dec 30, 2019 by The Conversation

The existence of habitable alien worlds has been a mainstay of popular culture for more than a century. In the 19th century, astronomers believed that...

Phosphine Could Signal Existence of Alien Anaerobic Life on Rocky Planets

Dec 26, 2019 by News Staff

A team of researchers at MIT has found that phosphine, which is among the stinkiest, most toxic gases on Earth, cannot be produced in any other way except...

SEM image showing Metallosphaera sedula cells colonizing the surface of the NWA 1172 particles. Image credit: Milojevic et al, doi: 10.1038/s41598-019-54482-7.

Scientists Find Meteorite-Eating Microorganism

Dec 5, 2019 by Enrico de Lazaro

A species of archaea called Metallosphaera sedula is capable of growth on stony meteorites, utilizing metals trapped within these extraterrestrial objects...

Wing of Mars insect caught on the rover; inset: enlarged portion of wing. Image credit: William Romoser, doi: 10.13140/RG.2.2.12363.95520.

NASA Photos Show Insect- and Reptile-Like Life Forms on Mars, Entomologist Says

Nov 21, 2019 by News Staff

Ohio University Emeritus Professor William Romoser has analyzed photos from NASA’s various Mars rovers, mostly from the rover Curiosity, and found insect/arthropod-...

Wells et al estimate that there should be at least 10 -- currently undiscovered -- exoplanets which are favorably located to detect the Earth and are capable of sustaining life as we know it. Image credit: NASA.

Humanity May Be Only Intelligent Life in Our Galaxy, or Even Universe

Oct 24, 2019 by The Conversation

Are we alone in the Universe? It comes down to whether intelligence is a probable outcome of natural selection, or an improbable fluke. By definition,...

An artist’s rendering of potentially habitable exoplanets, plus Earth (top right) and Mars (top center). Image credit: PHL@UPR Arecibo, phl.upr.edu / NASA / ESA / Hubble.

Alien Life on Some Extrasolar Planets Could Be More Diverse than on Earth

Aug 26, 2019 by News Staff

In a new study, University of Chicago researcher Stephanie Olson and colleagues modeled climates and ocean habitats of different types of extrasolar planets...

An artist’s impression of a flare erupting from the star Proxima Centauri and the glowing exoplanet Proxima b. Image credit: Roberto Molar Candanosa, Carnegie Institution for Science / NASA / SDO / JPL / Sci-News.com.

Biofluorescence Could Expose Hidden Alien Life on Exoplanets around Red Dwarfs

Aug 14, 2019 by News Staff

Powerful flares from M-type stars (red dwarfs) — once thought to destroy life on their planets — might help uncover hidden biospheres; their...

BioRock: Researchers to Examine Microbe-Mineral Interactions in Space

Jul 24, 2019 by News Staff

BioRock, a new investigation on the International Space Station (ISS), is expected to help gain insight into the physical interactions of liquid, rocks,...

$This enhanced-color view of Enceladus is largely of the southern hemisphere and includes the south polar terrain at the bottom of the image. Ancient craters remain somewhat pristine in some locales, but have clearly relaxed in others. Northward-trending fractures, likely caused by a change in the moon’s rate of rotation and the consequent flattening of the moon’s shape, rip across the southern hemisphere. The south polar terrain is marked by a striking set of ‘blue’ fractures and encircled by a conspicuous and continuous chain of folds and ridges, testament to the forces within Enceladus that have yet to be silenced. The mosaic was created from 21 false-color frames taken during Cassini’s close approaches to Enceladus on March 9 and July 14, 2005. Images taken using filters sensitive to UV, visible and IR light (spanning wavelengths from 338 to 930 nm) were combined to create the individual frames. Image credit: NASA / JPL / Space Science Institute.$

Enceladus’ Ocean Contains High Concentrations of Carbon Dioxide and Hydrogen, Scientists Say

Jun 25, 2019 by News Staff

Saturn’s small icy moon Enceladus contains a global subsurface ocean. According to new research from the University of Washington, the ice-covered ocean...

This artist’s impression shows a view of the surface of Proxima b orbiting Proxima Centauri. Alpha Centauri AB also appears in the image to the upper-right of Proxima itself. Proxima b is a little more massive than the Earth and orbits in the habitable zone around its star, where the temperature is suitable for liquid water to exist on its surface. Image credit: M. Kornmesser / ESO.

Our Closest Neighboring Exoplanets Could Be Habitable After All

Apr 11, 2019 by News Staff

Proxima b, TRAPPIST-1e, Ross-128b and LHS-1140b — the closest potentially habitable exoplanets — orbit a different kind of star than our Sun:...

Hungarian Researchers Claim to See Biosignatures in Martian Meteorite

Apr 4, 2019 by Natali Anderson

ALH-77005, a Martian rock found in Antarctica, contains numerous mineralized ‘biosignatures,’ including coccoidal, filamentous structures and organic...

An artist’s concept of a planet orbiting in the habitable zone of a K-type star. Image credit: NASA Ames / JPL-Caltech / Tim Pyle.

Exoplanets around K-Type Dwarf Stars are Promising Targets in Search for Alien Life: Study

Mar 11, 2019 by News Staff

K-type dwarf stars are dimmer than the Sun but brighter than the faintest stars. These stars live a very long time — 17 billion to 70 billion years,...

Mosaic of the Valles Marineris hemisphere of Mars projected into point perspective, a view similar to that which one would see from a spacecraft. The distance is 1,550 miles (2,500 km) from the surface of the planet. The mosaic is composed of 102 Viking Orbiter images of Mars. The center of the scene shows the entire Valles Marineris canyon system, over 1,240 miles (2,000 km) long and up to 5 miles (8 km) deep, extending form Noctis Labyrinthus, the arcuate system of graben to the west, to the chaotic terrain to the east. Many huge ancient river channels begin from the chaotic terrain from north-central canyons and run north. The three Tharsis volcanoes (dark red spots), each about 15.5 miles (25 km) high, are visible to the west. South of Valles Marineris is very ancient terrain covered by many impact craters. Image credit: NASA / JPL-Caltech.

Salty, Oxygenated Water on Mars Could Host Simple Aerobic Life

Oct 23, 2018 by News Staff

Caltech researcher Vlada Stamenković and co-authors calculated that if liquid water exists on the Red Planet, it could contain more oxygen than previously...

$If the development of life on other inhabited worlds follows a similar timeline to life on Earth, vegetation red edge (VRE) biosignatures are only present for a fraction of a planet’s habitable lifetime once vegetation covers the surface; a VRE biosignature similar to that on the present-day Earth would be difficult to detect without very high-precision instruments; however, the team’s models show that the VRE signature increases with geological time, as well as with increasing vegetation surface fraction and decreasing cloud coverage. Image credit: Jack O’Malley-James / Wendy Kenigsberg / Brand Communications.$