Andy travels back 145 million years to the time of allosaurus - a massive meat-eating dinosaur.

Andy travels back 65 million years to the time of Tyrannosaurus rex - his favourite dinosaur of all time.

Andy travels back 220 million years to the time of postosuchus - a giant crocodile-like creature

Andy travels back 152 million years, to the time of diplodocus - a massive 25-metre-long plant-eating dinosaur.

Andy travels back 150 million years and all the way to North America, the home of stegosaurus.

Andy travels back 65 million years to North America in the time of Tyrannosaurus rex.

Andy travels back 150 million years to the time of brachiosaurus.

Andy travels back 106 million years to the time of muttaburrasaurus.

Andy travels back 220 million years to the time of placerias, a giant hippo-like reptile.

Andy travels back 145 million years to the time of allosaurus, one of the planet's deadliest hunters of all time.

Andy travels back 127 million years to the time of ornithocheirus - one of the largest flying pterosaurs.

Andy travels back 220 million years to the time of coelophysis - one of the earliest dinosaurs that hunted in packs.

Andy travels back in time 127 million years to the time of the iguanodon - a plant-eating dinosaur that moved in herds.

Andy travels back in time 220 million years to the time of cynodont - a furry dog-like creature with excellent eyesight.

Andy travels back 65 million years to the time of triceratops, a plant-eating dinosaur which roamed North America.

Andy travels back to the time of iberomesornis - a bird that lived in the forests of Spain 127 million years ago.

Andy travels back in time 149 million years, to the time of the ammonites - a kind of mollusc.

Andy travels back in time 106 million years to the time of leaellynasaura, a dinosaur that lived in Australia.

Andy travels back in time 152 million years, to the time of diplodocus.

Andy travels back to the time of Tyrannosaurus rex - one of the largest meat-eating dinosaurs of its day.