Extragalactic radio sources as lighthouses for SETI

The search for extraterrestrial intelligence (SETI) is one of the most ambitious scientific endeavors. It aims at detecting signals produced intentionally or unintentionally by extraterrestrial civilizations ([Siemion et al., 2013](http://arxiv.org/abs/1412.4867)). The Galaxy, however, is vast a...

By Jorge I. Zuluaga

Supercritical Exoplanetary Atmospheres as Potential Habitats for Extraterrestrial Aeroplankton

An increasingly familiar class of exoplanets amongst those being continually discovered is the "Super-Earth" ([Valencia+2007](http://iopscience.iop.org/0004-637X/656/1/545/)), with a mass intermediate between Earth and Neptune. These have been found inside habitable zones ([Udry+2007](http://www...

By Mark Hammonds