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WHY haven't we heard from aliens? Nestled amongst the vast clouds of star-forming regions like this one lie potential clues about the formation of our own Solar System

Why haven't we heard from aliens? There is a reason for the silence

17 November 2021

The search for extraterrestrial intelligence has been going on for 60 years without success. Given the hurdles to interstellar communication, that's just a blink of an eye
Tidal pool under a lilac sky

Tides on exoplanets could drive alien biological clocks

24 July 2017

On watery worlds that lack days and nights because one face always points toward their star, tides may help life emerge – and algal blooms might be the giveaway

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