Shark week is almost here!! I just love those shows - the earliest known sharks date back more than 420 million years.
Wow that's really old? Have sharks changed much in that time?
Well the term shark has been used for extinct members so yes, they have changed a bit.
Interesting... Sharks really scare me ever since I saw Jaws...
I'm scared of them too - but they are also so fascinating - especially the Megalodon that lived 23 to 2.6 million years ago.
Wow that's along time ago... is that the largest kind of shark? Hence the mega?
I'm not sure if it's bigger than the whale shark is now which can get up to 60ft in length.