Electron microscopes are much more powerful than microscopes using light, but conventional models have a great disadvantage: they cannot be used on living cells or organisms. Their pictures of ...

Exploring a sourdough starter Since sourdough starters are created from wild yeast and bacteria in the flour, it creates a ...

At the beginning of the 19th century, though there had been some advances in medical knowledge, scientists still did not understand what caused disease. Joseph Lister was able to make a much more ...

Microorganisms are tiny. They are so small they can only be seen with a microscope. Yeast is a helpful microorganism which makes bread rise. Bacteria is a microorganism which breaks down plants ...