8 billion humans and 7 billion rats

There are more humans on earth than rats!

By over a billion in fact

That’s 8 billion humans to 7 billion rats

But only 700 million cats!

Goats, cows, and sheep

There are about one billion each

Scientists estimate 784 million hogs

And approximately 900 million dogs

Earth's mammal numbers are small to behold

Compared to 20 quadrillion nematodes! 

Those microscopic roundworms match the number of ants present on our planet 

Both are double the number of all other insects, but don’t panic!

In the oceans, Antarctic Krill number 500 trillion

But the deep sea bristlemouth fish many be more than a 20 quadrillion

Scientists have only discovered 10 to 20 percent of all life on our planet 

Now you may start to panic!