19/07/2023
Space probes have witnessed a big impact crater being formed on Mars - the largest in the Solar System ever caught in the act of excavation.
A van-sized object dug out a 150m-wide bowl on the Red Planet, hurling debris up to 35km (19 miles) away.
In more familiar terms, that's a crater roughly one-and-a-half times the size of London's Trafalgar Square.
And its blast zone would fit neatly in the area inside the UK capital's orbital motorway, the M25.
Scientists detected the event using the seismometer on the US space agency's InSight lander. The probe picked up the ground vibrations.