Putting the bones of giant, extinct ‘thunderbirds’ under the microscope reveals how they grew
Putting the bones of giant, extinct ‘thunderbirds’ under the microscope reveals how they grew: An artist's reconstruction of the giant _Dromornis stirtoni_. Peter Trusler © The largest flightless bird found anywhere in the world today is the ostrich. It stands about 2.5 metres tall and can weigh up to 240kg. But millions of years ago …
