WHAT do dinosaurs and echidnas have in common?
And no, this isn't a riddle, it's science.
Using new methods for analysing data, the scientists found dinosaur metabolic rates were intermediate to those of endotherms (organisms that maintain their own favourable body temperature, a.k.a. warm-blooded like you, your cat and the kookaburra outside) and ectotherms (which used their environment to maintain their temperature, like lizards and frogs).
According to the scientists' findings, the closest match is to existing mesotherms, such as great white sharks and echidnas.
"Our results suggest that the modern dichotomy of endothermic versus ectothermic is overly simplistic," the researchers say.
"So dinosaurs did not fully regulate their internal temperature but they were also not entirely at the whim of the environment; neither slow goliaths nor supercharged reptiles."
Get lost in the past with our dinosaur cards
ARE you mad for dinosaurs? Do you know your Brachiosaurus from your Brontosaurus, your Pteranodon from your Triceratops?
If you have a T-Rex at home chasing an Ankylosaurus around the lounge then we have just the treat for you!
APN Australian Regional Media's Dinosaur Collector Card series is shaping up to be the next best thing - cooler than the Nigersaurus and its 500 teeth or even the mighty Diamantinasaurus, Queensland's own prehistoric beast.
And you don't have to be the Flintstones to enjoy this exciting blast from the past.
With 40 cards to collect you can take a journey through yesteryear with us and get lost in the world of the unbelievable.
There are hundreds of interesting facts to peruse and beautiful artistic representations that will make learning so much fun for your kids.
Hidden in 200 cards is the opportunity to win an amazingly life-like T-Rex figurine instantly and there are also special entry invitations into the second-chance draw which features must-have dinosaur packs valued at $98.95 each.
Want more? Well you can hop onto our interactive prehistoric playtime site for more dino pleasure - discover your dinosaur name, design your own dinosaur or try to get past their sharp teeth and claws in our exciting dodge the dinosaur game.
All you have to do is redeem a token from this paper and exchange it for a set of two cards from participating newsagents.
The Dinosaur Collector Card series runs from Saturday, May 17 with the final cards available on Saturday, June 21. Collect them, swop them, and have fun doing it. Let's hear that dino roar!