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Frederick William Twort FRS [1] (22 October 1877 – 20 March 1950) was an English bacteriologist and was the original discoverer in 1915 of bacteriophages (viruses that infect bacteria). [4] He studied medicine at St Thomas's Hospital , London , was superintendent of the Brown Institute for Animals (a pathology research centre), and was a ...
Viruses were expected to be small, but the range of sizes came as a surprise. Some were only a little smaller than the smallest known bacteria, and the smaller viruses were of similar sizes to complex organic molecules. [14] In 1935, Wendell Stanley examined the tobacco mosaic virus and found it was mostly made of protein. [15]
The tiny (0.6 μm) marine cyanobacterium Prochlorococcus, discovered in 1986, forms today an important part of the base of the ocean food chain and accounts for much of the photosynthesis of the open ocean [84] and an estimated 20% of the oxygen in the Earth's atmosphere. [85]
A species of phototrophic bacterium has been found living near a black smoker off the coast of Mexico at a depth of 2,500 m (8,200 ft). No sunlight penetrates that far into the waters. Instead, the bacteria, part of the Chlorobiaceae family, use the faint glow from the black smoker for photosynthesis. This is the first organism discovered in ...
“Mirror bacteria” made in a lab could endanger all life on earth, an international group of leading scientists have warned in a new report. All building-block molecules of life like DNA ...
The bacteria are found naturally in warm seawater, and can cause a severe and potentially life-threatening illness in humans called vibriosis. Some experts warn it could pose a growing threat.
Clusters of brown Sargassum seaweed believed to be infested by flesh-eating bacteria are washing ashore in Florida.. A new study revealed how this 5,000-mile wide thicket of seaweed, known as the ...
Earth is the only place in the universe known to harbor life, where it exists in myriad environments. [8] [9] The origin of life on Earth was at least 3.5 billion years ago, possibly as early as 3.8-4.1 billion years ago. [2] [3] [4] Since its emergence, life has persisted in several geological environments.