Amphicoelias is believed to have been the largest dinosaur. It was 40 to 60m long and weighed 122 tonnes.
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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.