On Earth there is no record of Niallia tiangongensis, a bacterium found aboard the Tiangong station that appears to be well ...

Scientists discovered 'alien' bacteria on China’s Tiangong space station, raising questions about life in space.

Some bacteria produce endospores, or internal spores, while others produce exospores, which are released outside. These are known as cysts. Bacteria are often thought of as bad, but many are helpful.

Some bacteria even produce special structures, called endospores, which survive for a long time – even years – until they encounter favourable conditions which allow them to grow and produce ...

There are many ways of classifying bacteria. One method is based on the cell membrane. In 1884, a bacteriologist named Christian Gram created a test that could determine if a bacterium had a thick ...