The largest living thing is the blue whale, which can grow up to 100 feet long and weigh up to 200 tons. The blue whale is also the loudest animal on Earth, and its calls can be heard from cientos of kilómetros.
What are the smallest and biggest things alive?
The smallest living things are viruses, which are not considered living organisms by some biologists because they lack cells. Viruses are made of a protein coat that encloses a core of genetic material. The smallest known viruses are about 20 nanometers in diameter.