For billions of years, single-celled creatures had the planet to themselves, floating through the oceans in solitary bliss. Some microorganisms attempted multicellular arrangements, forming small ...

Theories about how animals became multicellular are shifting as researchers find greater complexity in our single-celled ancestors. From one came many. Some 700 million years ago, a single cell gave ...

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly genetically identical cells. Depending on the organism, these cells arrange ...

Unlike the alternative meat products that are already out there - vegetarian products that imitate meat - cultivated meat is meat. Here’s how it works. First, scientists take a tiny sample from an ...

Energy-making chloroplasts from algae have been inserted into hamster cells, enabling the cells to photosynthesize light, according to new research in Japan. It was previously thought that combining ...

The use of animals in research came about as scientists tried to understand the disease process and find ways of treating or curing diseases. While this gave rise to the medications we have today, ...