8 'monsters' we should thank heaven and earth for their disappearance

The mouse is as big as a cow, the crocodile is as big as . dinosaurs are monsters no one wants to see them in today.

Top species of animals make humans feel lucky because they are extinct

Over hundreds of millions of years, there are many species on Earth destroyed for many different reasons. However, many of these are "monsters" that perhaps we must silently . thank heaven and earth for their destruction.

1. Giant pythons are over 15m long, weigh 1 ton

About 60 million years ago, after the time of the extinction of the dinosaurs, giant Titanoboa replaced them to become the biggest and most aggressive predator on the planet.

They have an average length of 15m, weigh more than 1 ton, with a large amount of muscle enough to crush every prey. Compared to today, the giant python legend Anaconda only recorded 11m length only.

2. Dragonfly half a meter long

Modern dragonflies are a harmless and cute creature. However in the Carbon Age about 300 million years ago, the ancestors of dragonflies - Meganeura species - were insect monsters with a half-meter wingspan.

Imagine how you will need . tennis rackets to scare away when these "monsters" fly into your house.

3. The mouse is as big as the cow

The mouse must be the obsession of many people, and it will be more haunting if the mouse can be as big as a cow.

About 8 million years ago there was a rat like that - with the scientific name Phoberomys pattersoni . Fossil evidence suggests that they are more than 3m long, with a tail about 1.5m long.

As a rodent, it's super-sized, can you imagine how horrible a bite of Phoberomys pattersoni? Knowing that rats today have very sharp teeth, with bite force up to . almost 1 ton / 1cm2.

4. Bears are twice as tall as ordinary people

The bear was originally a respectable creature. However, a brown bear (the largest bear today) only has a body length of about 2.8 - 3m.

But only 11,000 years ago, there was a bear with a height of up to 4m, more than double that of ordinary people.Short -faced bear - short-faced bear.

Scientists say this is a fierce carnivore, about 50% larger than the largest polar bears in the world today. Every day, this bear needs to load about 15kg of fresh meat.

5. Piranhas are as big as . skis

Piranhas are still assassins on the Amazon River (South America). As noted, a flock of piranhas can clean a cow's flesh in just 15 minutes.

However, piranhas are now quite modest in size, with a length of only about 15 - 26cm. Meanwhile about 10 million years ago, their ancestors - Megapiranha species - up to . 1m long, with an estimated size of a skateboard now.

It's hard to imagine how other creatures can exist in the same place as this monster fish?

6. Sharks that turn white sharks today are just like . goldfish

Indeed. Giant white shark - the largest shark today only reaches a maximum size of 6m. And Megalodon - a giant shark appeared 15 million years ago - can reach size up to 18m, making the white shark "giant sea" today become really pathetic when compared.

The white shark's teeth are just like . baby teeth compared to their ancestors.

Megalodon is also known as the most terrible predator ever existed.

7. Crocodiles are as big as . tyrants

The crocodile Deinosuchus is a genus of crocodiles that lived 80 million years ago. Their name means "terrible crocodile".

Deinosuchus is about 10m in size, a little smaller than the tyrannical dinosaur (12m). However, the fossils of dangerous dinosaurs, even the tyrannical dinosaurs have . the markings of this crocodile. This is enough to show their ferociousness . "martyrdom".

8. The bird "crushed the skull" like . watermelon

It is the Phorusrhacidae - also known as terror bird , which appeared more than 60 million years ago. And as the name suggests, they are terrifying birds.

This bird has a height of up to 3m, and is a fierce predator. They have a very strong and very sharp beak, plus huge bodies that allow them to knock down enemies . crushing the skull.