Hi! I'm Danya. I make worlds.

The only dinosaur that could really swim. My favourite: half reptile, half shark.

The sail on its back was taller than an adult, and its jaws were crocodile-like: it caught fish as long as I am.

The strongest bite of any land animal ever — about the weight of three cars.

It also had a superb sense of smell — it could scent prey kilometres away, like a dog.

Claws almost a metre long — and it ate plants. The strangest dinosaur on my list.

The claws probably pulled branches down — and kept attackers away.

Crow-sized, with four wings — it had feathers on its hind legs too.

Scientists studied the fossil under a microscope and found it was black with a blue sheen.

As long as four buses. A single vertebra came up to my chest.

To grow that big it had to eat almost around the clock — as if it never slept.

Because of him scientists realised dinosaurs were fast and clever, not sluggish.

Each foot had a sickle claw that lifted while running so it would not blunt.

The biggest fish on Earth — and it eats plankton. The kindest giant of the ocean.

Its spots are unique like fingerprints — scientists identify every individual by them.

The longest-living vertebrate. One swimming today may be older than your country’s founding.

It matures only at about 150 — so right now there are teenage sharks older than my great-grandmother.

It shoots its jaw forward as if on a spring. Almost nobody has seen one alive.

It was described only in 1898, and fewer than fifty have ever been caught.

It can leap clear out of the water with its prey. That is called breaching.

It senses electric fields and finds fish even when they hide motionless in sand.

The hammer is not for ramming — the wide-set eyes give it much better vision.

Hammerheads gather in schools of hundreds — and nobody quite knows why.

A megalodon tooth is the size of my palm. The shark was three times a great white.

It has been gone for millions of years — yet someone “finds” a live one online every year. Do not believe it.