The world would look very different without multicellular organisms—take away the plants, animals, fungi, and seaweed, and Earth starts to look like a wetter, greener version of Mars. But precisely how multicellular organisms evolved from single-celled ancestors remains poorly understood. The transition happened hundreds of millions of years ago, and early multicellular species are largely lost to extinction.
Click here for original story, A journey to the origins of multicellular life: Long-term experimental evolution in the lab
Source: Phys.org