Human

The Great Wall of China cannot be seen from space by the human eye without aid.

A few robots do surgery in places inside the body where a human hand is too big.

The word 'Android' means a human with a male robot appearance.

They worshiped a mysterious, unnamed god that was part of Jaguar and part human.

The Aztecs adopted human sacrifice from earlier cultures (such as the Olmecs) because they believed the universe would come to an end and the sun would cease to move without human blood.

It is possible that its size may eventually permit human colonies.

Cat brains are very similar to human brains.

In remote areas, such as Africa, drones are used for the shipment of live-saving medical equipment and medication where human transport would be too time consuming.

Its brain only weighs around 22 ounces, making it just half the weight of a human brain.

An eagle's beak contains keratin, which means that it grows all the time just like human hair and fingernails.

Cheetahs require large areas of land for survival, so increased human settlements and road construction in their habitat puts them at risk.

In turn, fog has affected many human activities, such as shipping, travel, and warfare.

Snow affects such human activities as transportation: creating the need for keeping roadways, wings, and windows clear;

Machu Picchu wasn't used for human sacrifices.

There are many myths and legends of Machu Picchu being used as a site for human sacrifice, yet very little scientific evidence backs this fact up.

It's no small surprise though, as the fabled mountain citadel was originally thought to be a sanctuary for the Chosen Women, who among other duties often ended up as human sacrifices.