THE GUARDIAN: Zombie ammonite discovery is 'snapshot of an unusual moment in deep time'

Description

In your mind’s eye, imagine yourself floating in a shallow, semi-tropical lagoon. It’s like the Bahamas: warm water enveloping your skin, the sun shimmering through the gently slopping surface and sending the shadows of ripples onto the pale sand beneath you. It’s very quiet here, because there are no other humans on Earth. You are swimming in the Late Jurassic.