Find out what an organism is and consider which one is the world's smallest

Find out what an organism is and consider which one is the world's smallest

Find out what an organism is and consider which one is the world's smallest

Learn what defines an organism and consider two candidates for the title of world's smallest organism—the bacteria Carsonella ruddii and Mycoplasma genitalium.

Encyclopædia Britannica, Inc.

Find out what an organism is and consider which one is the world's smallest
Learn how paired chromosomes composed of mostly DNA determine an organism's heredity
Where did human evolution begin?
Learn how Austrian Catholic monk and botanist Gregor Mendel observed properties of heredity
Brian Greene asks Richard Dawkins: Does God exist?
See a survey comparing the largest known single living organisms on Earth: from the animal, plant, and fungal kingdoms
Hear psycholinguist Steven Pinker outlining the evolution of several unique traits in humans as compared with other species
Know how the Galapagos finches from Charles Darwin's specimen collection helped him in the formulation of his theory of evolution, particularly the woodpecker finch
Why is carbon called the element of life?