Thinking big

In the past 14 months, palaeontologists have had a great time unearthing mega fossils.

South America has been home to some of the biggest finds. For example, in 2008, Argentinians discovered the fossil of a 36m, 63-tonne, long-necked and long-tailed dinosaur, . But last year, Argentinian palaeontologists uncovered the incomplete skeleton of another giant, some 98 million years old, that may be even larger.