The Great Filter theory suggests advanced civilisations may self-destruct before contacting others, explaining the universe's ...

Scientists say moons around rogue planets wandering through the galaxy could remain warm enough for life thanks to tidal heating and hydrogen-rich atmospheres. These dark, starless worlds may have had ...

Scarlett Dargan imagines this week's generational debate ...

An interstellar comet that passed through the Solar System last year may be up to 12 billion years old – far older than the ...