Virtually all oxygen on Earth was and is produced by photosynthesis, which was invented by tiny organisms, the cyanobacteria, when our planet was still a rather uninhabitable place.
We present occurrence rates for rocky planets in the habitable zones (HZ) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar properties.
The Gaia hypothesis postulates that life regulates its environment to be favorable for its own survival. Most planets experience numerous perturbations throughout their lifetimes such as asteroid impacts, volcanism, and […]
Brazilian researchers have reconstructed the evolutionary history of amoebae and demonstrated that at the end of the Precambrian period, at least 750 million years ago, life on Earth was much […]
When the moon is high in the sky, it creates bulges in the planet’s atmosphere that creates imperceptible changes in the amount of rain that falls below.
Two University of Colorado Boulder researchers who have adapted a three-dimensional, general circulation model of Earth’s climate to a time some 2.8 billion years ago when the sun was significantly […]
Two recent high-profile phylogenetic studies reached conflicting conclusions about whether snail’s closest relatives are bivalves or an enigmatic group called tusk shells. Vanderbilt phylogeneticists suggest that the cause of this […]
