PRI's The World Published by PRI's The World That's not a pebble. It's a fossilized dinosaur brain. Listen Queue Download this audio Want to embed this player? Use the code below. More info. <iframe frameborder="0" scrolling="no" height="130" width="100%" src="https://www.wnyc.org/widgets/ondemand_player/wnyc/#file=/audio/json/678014/&share=1"></iframe> Share on Facebook Share on Twitter Email a Friend Back in 2004 Jamie Hiscocks was taking a walk on the beach in the south of England when he spotted a small brown pebble — just a few inches across. About 130 million years before, it had been a brain. A dinosaur brain.