Life emerged on Earth some 3.8 billion years ago. The "primordial soup theory" proposes that chemicals floating in pools of water, in the presence of sunlight and electrical discharge, spontaneously ...

My childhood fascination with the night sky led me to study astronomy and physics at university. By my second year, I was ...

A stentor is a trumpet-shaped, single-celled organism up to 2 mm long. It uses its holdfast to anchor to surfaces in ponds or ...