Q 01/05

What did farmer Guillermo Heredia think he had found when he uncovered the first Argentinosaurus bone on his land?

A) A cattle skeleton

B) A petrified log

C) A fallen meteorite

D) A buried boulder

Answer · why

B) A petrified log

A petrified log was Heredia's first guess, so he reported the find to the local museum. Its staff dug out a leg bone about 1.55 metres long.

Q 02/05

Which living animal is far heavier than even Argentinosaurus ever was?

A) Sperm whale

B) Fin whale

C) Blue whale

D) Whale shark

Answer · why

C) Blue whale

Blue whale adults can weigh more than 150 tonnes, so even this giant of the land was far lighter than a creature alive today.

Q 03/05

Despite its record-breaking adult size, a newly hatched Argentinosaurus probably weighed no more than what?

A) About 5 kg

B) About 50 kg

C) About 500 kg

D) About 5 tonnes

Answer · why

A) About 5 kg

About 5 kg is the most a hatchling is thought to have weighed. Giants like this multiplied their size around 100,000 times as they grew, more than any...

Q 04/05

A 2013 computer simulation of a walking Argentinosaurus put the giant dinosaur's top speed at roughly what?

A) About 1.5 mph

B) About 5 mph

C) About 15 mph

D) About 45 mph

Answer · why

B) About 5 mph

About 5 mph was the model's limit, just over two metres per second. The virtual skeleton learned to walk through machine learning that searched for th...

Q 05/05

Argentinosaurus belonged to which major dinosaur group, known for long necks, long tails and four pillar-like legs?

A) Theropods

B) Ornithopods

C) Ceratopsians

D) Sauropods

Answer · why

D) Sauropods

Sauropods include the longest and heaviest dinosaurs ever found. Argentinosaurus sat in a late branch called the titanosaurs, the last of the group to...