SETI

Concepts For Future Missions To Search For Technosignatures

Concepts For Future Missions To Search For Technosignatures

New and unique opportunities now exist to look for technosignatures (TS) beyond traditional SETI radio searches, motivated by tremendous advances in exoplanet science and observing capabilities in recent years.

Habitable Zones & Global Climate

Implications Of An Improved Water Equation Of State For Water-rich Planets

Implications Of An Improved Water Equation Of State For Water-rich Planets

Water (H2O), in all forms, is an important constituent in planetary bodies, controlling habitability and influencing geological activity.

Space Life Science

International Space Station Archives Fuel New Scientific Discoveries

International Space Station Archives Fuel New Scientific Discoveries

When scientists complete an experiment aboard the International Space Station, the ramifications of that work have just begun. NASA carries on a legacy of decades of biological research data, fueling new discoveries long after studies wrap up in space.

Astrochemistry

Discovery of Allenyl Acetylene, H2CCCHCCH, in TMC-1. A Study Of The Isomers Of C5H4

Discovery of Allenyl Acetylene, H2CCCHCCH, in TMC-1. A Study Of The Isomers Of C5H4

We present the discovery in TMC-1 of allenyl acetylene, H2CCCHCCH, through the observation of nineteen lines with a signal-to-noise ratio ~4-15. For this species, we derived a rotational temperature of 7 +/- 1 K and a column density of (1.2 +/- 0.2)e13 cm-2.

Extremeophiles and Extreme Environments

Microbes Deep Beneath The Seafloor Survive On The Byproducts Of Water Molecule Irradiation

Microbes Deep Beneath The Seafloor Survive On The Byproducts Of Water Molecule Irradiation

A team of researchers from the University of Rhode Island's Graduate School of Oceanography and their collaborators have revealed that the abundant microbes living in ancient sediment below the seafloor are sustained primarily by chemicals created by the natural irradiation of water molecules.

Impact events

Asteroid Dust Found In Crater Closes Case Of Dinosaur Extinction

Asteroid Dust Found In Crater Closes Case Of Dinosaur Extinction

Researchers believe they have closed the case of what killed the dinosaurs, definitively linking their extinction with an asteroid that slammed into Earth 66 million years ago by finding a key piece of evidence: asteroid dust inside the impact crater.

Habitable Zones & Global Climate

Oxygen As A Control Over 2.4 Billion Years Of Earth's Atmospheric Evolution

Oxygen As A Control Over 2.4 Billion Years Of Earth's Atmospheric Evolution

Since the formation of the terrestrial planets, atmospheric loss has irreversibly altered their atmospheres, leading to remarkably different surface environments - Earth has remained habitable while Venus and Mars are apparently desolate.

Habitable Zones & Global Climate

The Rotational And Divergent Components Of Atmospheric Circulation On Tidally Locked Planets

The Rotational And Divergent Components Of Atmospheric Circulation On Tidally Locked Planets

Tidally locked exoplanets likely host global atmospheric circulations with a superrotating equatorial jet, planetary-scale stationary waves and thermally-driven overturning circulation.

Microbiology

How To Have Memories Without Having A Brain

How To Have Memories Without Having A Brain

Having a memory of past events enables us to take smarter decisions about the future.

Habitable Zones & Global Climate

Milky Way May Be Swarming With Planets With Oceans And Continents Like Earth's

Milky Way May Be Swarming With Planets With Oceans And Continents Like Earth's

Astronomers have long been looking into the vast universe in hopes of discovering alien civilisations. But for a planet to have life, liquid water must be present.

Mars

Life From Earth Could Temporarily Survive On Mars

Life From Earth Could Temporarily Survive On Mars

Some microbes on Earth could temporarily survive on the surface of Mars, finds a new study by NASA and German Aerospace Center scientists.

More top stories from March.