With the number of potentially habitable exoplanets in our galaxy alone estimated to be in the billions, many wonder why we are yet to see signs or hear from intelligent alien life. A pair of astrobiologists from the Australian National University (ANU) Research School of Earth Sciences hypothesize the reason may be that ET could be long dead. According to Aditya Chopra and Charley Lineweaver, conditions on young planets are so volatile that if life doesn't evolve fast enough to stabilize the environment, it will quickly become extinct.
NASA has uploaded audio from the Voyager program's golden records to SoundCloud, allowing listeners to hear what may potentially be our first contact with an alien race. The agency has made available two playlists, known as Greetings to the Universe and Sounds of Earth.
At a Royal Society event in London earlier this week, Professor Stephen Hawking, Astronomer Royal Lord Martin Rees, and entrepreneur Yuri Milner announced an ambitious 100 million dollar initiative aimed at galvanizing the search for extraterrestrial life. The initiative would seek to make use of a blend of cutting edge telescopes and crowd sourcing to bring the hunt for life in line with present day technological capabilities.
A team of researchers
from MIT and Aarhus University, Denmark, have discovered that
Earth-sized exoplanets orbit their parent stars in the same way that
our planet orbits our own Sun – maintaining a roughly equidistant
circular orbit. The discovery further narrows the characteristics of
worlds that could potentially play host to extraterrestrial life.