Diplodocus may have been among the longest lived dinosaurs, reaching 50-80 years old. That compares to the large bipedal carnivores like T.rex who would have reached just 30 years.

Its habitat was once a verdant landscape of rivers, lakes, and vast plains.

Diplodocus had slender, pencil-like teeth set at the front of its mouth for stripping vegetation.

A single Diplodocus fart would have produced enough gas to fill a hot air balloon!

Some scientists have argued thatDiplodocus could rear up on its hind feet, making it tall enough to reach the sixth floor of a modern tower block! Imagine the thud when it crashed back down to earth!

Diplodocus' fastest speed was more than 8 kph (5 mph) slower than its predator Allosaurus.

Diplodocus may have travelled in herds over the plains.

Diplodocus eggs were as large as eggs could be; any bigger and the egg would have been too thick for the little dinosaurs to break out!

Diplodocus' extremely long tail, which was about half its total body length, acted as a counterbalance.



"Double Beam"


A massive plant-eating dinosaur straight out of the movies. It is built like a suspension bridge, with an impressively long whip-like tail and neck.



Diplodocus lived during the Late Jurassic.

Extinct for about: 00,000,000,000 Days00 Hours00 Min00 Sec

How old are you?
00,00,00.00 of your lifetimes have passed since their extinction.

They Call it Home

Diplodocus can be found in North America’s Morrison Formation, an area that includes Colorado, Utah, Montana, and Wyoming. In this Jurassic treasure trove, its fossils have been found along with those of Allosaurus, Stegosaurus, Brachiosaurus and Apatosaurus.





Rivers / Lakes

Rivers / Lakes




  • North America (Morrison Formation)
  • Montana
  • Wyoming
  • Utah
  • Colorado

What We Heard About Their Hearing

Human Ear

There is still much to discover about Diplodocus' sense of hearing.


What Big Teeth You Have

Dinosaur Tooth

Diplodocus had about 40 teeth, all of which were pointing slightly forward giving the dinosaur a very goofy expression.


Nose Knowledge

Human Nose

We used to think that the nostrils of Diplodocus were on top of its head and would have been used as a snorkel for swimming. Recently it was discovered that the nostrils were located on either side of the mouth to keep its brain cool and sense its environment.


The Poop Scoop

Dinosaur Poop

Diplodocus’ poo may have been a tonne or two of liquid dropped from a great height. On the ground it may have formed a pool over 10 m (33 ft) across. If you ever find yourself standing under Diplodocus, make sure you take a strong umbrella and thick boots.


The Most Fantastic Find

The most complete Diplodocus fossil was found in North America at Sheep Creek, within the Morrison Formation. It was discovered in 1899 on a trip funded by Andrew Carnegie, one of the world’s wealthiest men at the time. By July 2nd 1899, Jacob Wortman, the curator of vertebrate palaeontology at Pittsburgh’s Carnegie Museum of Natural History, Arthur Coggeshall, the preparator at the same museum and Bill Reed from the University of Wyoming had uncovered fossils of Diplodocus. Andrew Carnegie had these fossils replicated and presented to King Edward VII at the British Museum. He then sent other copies to various museums in Europe and South America. Diplodocus was the most celebrated dinosaur of the early 20th century and even more importantly, many of Carnegie’s cast specimens offered millions of people their first chance to see a dinosaur.

From The Expert

The long tail of Diplodocus was probably its primary weapon against predators. Studies using advanced computer modelling programs have suggested that Diplodocus could whip its tail at supersonic speeds—almost 800 mph. Imagine how the sound of a supersonic boom would have struck fear into the heart of an Allosaurus on the prowl.


Sizing it Up


Compare to:

14m / 45.92ft

Diplodocus could reach the 6th floor of a modern tower block.

1 human
1 human
14 m / 45.92 ft


Number of people head-to-toe to reach the top of Diplodocus. (average human height 1.76 m / 5.7 ft)

Compare to:

25m / 82.0ft

Diplodocus could be as long as your local swimming pool.

1 human
1 human
25 m / 82.0 ft


Number of people side by side touching finger tips to match this length (average arm span 1.7 m / 5.58 ft ).

Compare to:

12.0tonnes / 13.44short tons

Diplodocus weighed as much as a truck.

diplodocus weight

Number of people weighing 70.31 kg / 155 lbs needed to match the weight of Diplodocus.


Dino On The Go!

The top speed of Diplodocus.

24.1kph / 14.98mph

  • Horse 52 kph / 32.3 mph
  • Diplodocus24.1 kph / 14.98 mph
  • Cheetah 120.7 kph / 75 mph

22.5kph / 14mph

The average human sprint speed.


Family Album

Family Album

Diplodocus is a sauropod, a member of the group of giant long-necked herbivorous dinosaurs. Relatives included Brachiosaurus and Apatosaurus.

Sauropods were the largest, heaviest and tallest land animals ever to walk the earth.



Diplodocus Vision

With eyes pointing out on either side of its head, Diplodocus had good side vision to keep a watch out for predators like Allosaurus.

Diplodocus Vision.

Human Vision

The human field of view is roughly 180 degrees.

Human Field of View

The Skinny On Their Skin


Diplodocus skin had a pattern of tiny, pinhead-sized bumps.


What's In The Nest?

Diplodocus Egg

Sauropod eggs like Diplodocus were about the size of a grapefruit 10 cm (4 in) long, containing up to 5.5 l (11 pt) of fluid. Some sauropod eggs were larger, about the size of a football.



diplodocus brain size

For its size, Diplodocus had a tiny brain, weighing just 113 g (4 ounces).


Quite The Bite



Good Eatin'

Plant Icon

Diplodocus was so huge it would have had to consume several tonnes of food a day. The front limbs of Diplodocus were shorter than its hind limbs allowing easy access to low lying vegetation.

Diplodocus had an extra long claw on its thumb which was either used for fighting or raking branches or both.


Parental Guidance

Diplodocus Parent and Child

An adult Diplodocus, with its massive size, would have been formidable prey for any predator.

The much smaller juveniles, however, were relatively defenceless against predators. They may have formed their own groups, with the idea that safety in numbers was the best deterrent against a hungry Allosaurus.


True Colours

Color Wheel

We don’t quite know, so traditional dinosaur illustrations are our best guide!