Researchers uncover potential biosignatures on Mars
Peer-Reviewed Publication
Updates every hour. Last Updated: 6-Nov-2025 22:11 ET (7-Nov-2025 03:11 GMT/UTC)
New observations of a merger of two black holes confirm decades-old predictions by Albert Einstein, Stephen Hawking and Roy Kerr. The findings emerged from analyses led by Flatiron Institute astrophysicists using the clearest measurements to date of a black hole merger taken by the Laser Interferometer Gravitational-Wave Observatory (LIGO).
LIGO's improved sensitivity is showcased in a discovery of a black hole merger detected in January of this year. Scientists analyzing this signal were able to provide the best observational evidence yet for what is known as the black hole area theorem, an idea put forth by Stephen Hawking in 1971 that says the total surface areas of black holes cannot decrease.
Planetary scientists believe they can now predict the green glow of an aurora in the night sky above Mars, and they have the images to prove it. The first observations of a visible-light aurora from the surface of the Red Planet were made by NASA’s Perseverance Mars rover in 2024. Now, presenting at the Europlanet Science Congress–Division of Planetary Science (EPSC–DPS) joint meeting in Helsinki this week, Dr Elise Wright Knutsen of the University of Oslo will reveal a second snapshot of the aurora by Perseverance and, more importantly, the tools to predict when an aurora will occur on Mars.
A new AI-powered tool has reduced astronomers’ workload by 85% - filtering through thousands of data alerts to identify the few genuine signals caused by supernovae (powerful explosions from dying stars). The findings have been published today (10 Sept) in The Astrophysical Journal.