But complex multicellular organisms have arisen just six times on the tree of life: plants, animals, two groups of fungi, and two groups of algae. 4th of July Sale - 25% OFF!

Life and death are traditionally viewed as opposites. But the emergence of new multicellular life-forms from the cells of a ...

In a stunning scientific breakthrough, researchers from the University of California, Berkeley have discovered a living fossil in one of California’s untouched mountain lakes—a microscopic, ...

Research shows that there may be a third state between life and death where certain cells find new life as multicellular organisms.

Scientists have discovered the fossil of what may be the earliest multicellular animal ever found. Dating back a billion years, the microscopic fossil contains two distinct cell types, potentially ...

In multicellular animals, the gene domains found new purposes, such as allowing cells to signal one another. Single cells used these tools to listen in on the environment.

More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago. [ More news about the search for life ] You may like ...

Scientists said some single-celled organisms, including fungi and amoebas, have also lost the need to breathe over time, but this is the first time it's been documented in an animal.

The multicellular organism, which is part of a group of animals closely related to jellyfish known as the Myxozoa, does not breathe at all and does not have mitochondrial DNA.

Each fossil measures a mere 0.03 inches or so across and comes from what would have been a shallow marine environment at the time. But no adult animals that might have produced these embryos have ...

A microscopic animal has been revived after slumbering in the Arctic permafrost for 24,000 years. Bdelloid rotifers typically live in watery environments and have an incredible ability to survive.