Does pond water hold a microscopic key to understanding evolution? Examining pond water with a microscope in 1674, Anton van Leeuwenhoek observed many single-celled organisms, which he called ‘animalcules’. Some formed colonies or clusters, others were clearly multi-cellular, and one of these is a tiny green alga called Volvox. So, could this tiny creature be… Continue reading A microscopic key to evolution – volvox