Amphicoelias is believed to have been the largest dinosaur. It was 40 to 60m long and weighed 122 tonnes.
The blue whale, measuring up to 33m long and weighing up to 200 tonnes.
Largest land animal
The African bush elephant, measuring up to 7.5m long and weighing 6 tonnes.
The giraffe, measuring up to 6m tall and weighing 1.6 tonnes.
The southern elephant seal, measuring up to 6.85m and weighing up to 5 tonnes.
The saltwater crocodile, measuring up to 6m and weighing up to 1 tonne.