Storiascopio · Era 1 of 12 · primary year 3
The first mammals
about 225 million years ago · Pangaea
In short
The first mammals were small animals, rather like shrews, that lived alongside the first dinosaurs. They had teeth of different shapes and replaced them only once, just like us. They probably had fur and fed their young on milk, even though fur and milk are not preserved in fossils. For millions of years they mostly stayed small.
Why it matters From these modest creatures come all mammals, including humans, whales and bats.
Source: Natural History Museum (London), “Earliest known mammal is identified using fossil tooth records”
Where we are in the era “The Earth before us”
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about 13.8 billion years agoEvent 23 of 25about 66 million years ago
Your turn
Name ______________________ Class ______ Date __________
When did it happen? Find the date at the top and write it here:
Tell it in your own words: what happened?
Draw the scene below.
storiascopio.com/en/event/the-first-mammals/ · free worksheet, you may photocopy it for your class