The 'Mount Everest' of bacteria discovered in Caribbean swamps

WASHINGTON: The largest-known bacterium - a vermicelli-shaped organism that was discovered in shallow mangrove swamps in the Caribbean and is big enough to be seen with the naked eye - is redefining what is possible for bacteria, Earth's most ancient life form.

Scientists said on Thursday the bacterium, called Thiomargarita magnifica, is noteworthy not merely for its size - colossal for a single-celled organism at up to about eight-tenths of an inch (2 cm) long - but also because its internal architecture is unlike other bacteria.