Scientists have a recording of the worst day on Earth; certainly the worst day in the last 66 million years.

It takes the form of a 130m section of rock drilled from under the Gulf of Mexico.

These are sediments that were laid down in the seconds to hours after a huge asteroid had slammed into the planet.

You'll know the event we're talking about - the one researchers now think was responsible for the demise of the dinosaurs and the rise of mammals.