Phytoplankton numbers have fallen across the world over the last century, particularly towards the poles and in the open oceans.
Physicists count the number of atoms to measure temperatures that are a few billionths of a degree above absolute zero.
Worlds of the approximate size of Earth appear to dominate our Milky Way.
A quasar is observed to act as a gravitational lens for the first time, which allows an estimate of the mass of the galaxy hosting the quasar.
A star with 265 times the mass of our Sun is discovered, the heaviest one discovered to date.
Using lasers on muonic hydrogen reveals that the size of the proton is slightly smaller than previously believed, which could have profound implications in the theory of particle physics.
The Planck spacecraft, designed to observe the cosmic microwave in unprecedented detail, releases its first all sky map.
Astronomers verify that a supposed directly imaged exoplanet is indeed a planet.
The Earth and Moon may have been formed over a hundred million years later than previously thought.
The science team for the Kepler spacecraft announces the discovery of 306 new extrasolar planets.
