Could someone across the cosmos pick up old radio programmes?

When comet 3I/ATLAS was discovered in July, on a one-way interstellar journey through our Solar System, Harvard astronomer Avi Loeb suggested it might be an alien spacecraft paying us a visit. Back in

Speak your mind

Might our universe – as vast as it is – be simply one of many? We look at the growing evidence that there’s more than one cosmos out there

We’d love to hear from you. Write to ...

Michael Henderson on Radio ROBERTO RICCIUTI/GETTY IMAGES; EVENING ...

Imagine you’re in a woodland, with sunlight filtering through the endless green canopy overhead. There’s uniqueness everywhere. Some trees grow bolt upright, but others are wizened and twisted. Here t