Human cells are in many fundamental respects similar to those that make up all the other animals and plants on the Earth. Largest whales at about 150 tons are about 2000 times as heavy as ordinary humans. The General Sherman tree in Sequoia National Park is estimated to be between 3000 and 4000 years old. Compared with human-enacted production of machines, such as space probes and robots, Nature is extremely efficient. Human cells are in many fundamental respects similar to those that make up all the other animals and plants on the Earth.
Humans differ most in brain capacity and consciousness.