Biosignatures & Paleobiology

Lake Bed Reveals Details About Ancient Earth

Lake Bed Reveals Details About Ancient Earth

Sleuthing by a Rice University postdoctoral fellow is part of a new Nature paper that gives credence to theories about Earth's atmosphere 1.4 billion years ago.

Oceanic Research

Origami-Inspired Device Helps Marine Biologists Study Aliens

Origami-Inspired Device Helps Marine Biologists Study Aliens

Scientists have tried to find the safest and most effective ways to explore marine life in the oceanic water, the largest and least explored environment on Earth, for years.

Habitable Zones & Global Climate

Evolution of Earth-like Extrasolar Planetary Atmospheres

Evolution of Earth-like Extrasolar Planetary Atmospheres

Understanding the evolution of Earth and potentially habitable Earth-like worlds is essential to fathom our origin in the Universe.

Extrasolar Planets

Atmospheric Circulation and Thermal Phase-Curve Offset of Tidally and Non-Tidally Locked Terrestrial Exoplanets

Atmospheric Circulation and Thermal Phase-Curve Offset of Tidally and Non-Tidally Locked Terrestrial Exoplanets

Using an idealised general circulation model, we investigate the atmospheric circulation of Earth-like terrestrial planets in a variety of orbital configurations.

Habitable Zones & Global Climate

The Inner Solar System's Habitability Through Time

The Inner Solar System's Habitability Through Time

Earth, Mars, and Venus, irradiated by an evolving Sun, have had fascinating but diverging histories of habitability. Although only Earth's surface is considered to be habitable today, all three planets might have simultaneously been habitable early in their histories.

Extrasolar Planets

Exoplanet Atmosphere Measurements From Direct Imaging

Exoplanet Atmosphere Measurements From Direct Imaging

In the last decade, about a dozen giant exoplanets have been directly imaged in the IR as companions to young stars.

Habitable Zones & Global Climate

Photosynthesis on a Planet Orbiting an M Dwarf: Enhanced Effectiveness During Flares

Photosynthesis on a Planet Orbiting an M Dwarf: Enhanced Effectiveness During Flares

On planets near M dwarfs, photosynthesis (PS) will occur with an effectiveness which depends on the supply of visible photons with wavelengths between 400 and 700 nm. In this paper, we quantify the effectiveness of PS in two contexts which are relevant for M dwarfs.

Biosignatures & Paleobiology

Scientists Discover Earth's Youngest Banded Iron Formation In Western China

Scientists Discover Earth's Youngest Banded Iron Formation In Western China

The banded iron formation, located in western China, has been conclusively dated as Cambrian in age. Approximately 527 million years old, this formation is young by comparison to the majority of discoveries to date.

Extrasolar Planets

Rocky Planet Ross 128 b Is Not Earth's Twin

Rocky Planet Ross 128 b Is Not Earth's Twin

Last autumn, the world was excited by the discovery of an exoplanet called Ross 128 b, which is just 11 light-years away from Earth.

Habitable Zones & Global Climate

Oxygen Levels on Early Earth Rose And Fell Several Times

Oxygen Levels on Early Earth Rose And Fell Several Times

Earth's oxygen levels rose and fell more than once hundreds of millions of years before the planetwide success of the Great Oxidation Event about 2.4 billion years ago, new research from the University of Washington shows.

Astrogeology

Mineralogy, Structure and Habitability of Carbon-enriched Rocky Exoplanets: A Laboratory Approach

Mineralogy, Structure and Habitability of Carbon-enriched Rocky Exoplanets: A Laboratory Approach

Carbon-enriched rocky exoplanets have been proposed around dwarf stars as well as around binary stars, white dwarfs and pulsars. However, the mineralogical make up of such planets is poorly constrained.

More top stories from July.