Current thinking on how the Toxoplasma gondii parasite invades its host is incorrect, according to a study published today in Nature Methods describing a new technique to knock out genes. The findings could have implications ...
Definition. Coral bleaching is a process whereby the coral colonies lose their colour, either due to the loss of pigments by microscopic algae (zooxanthellae) living in symbiosis with their host organisms (polyps), or because these zooxanthellae have been expelled.
Now they're worried police searched them ðð±. Surveys of the Great Barrier Reef confirmed scientists' fears that a wave of coral bleaching has struck the reef for a second year in a row. Explosions struck two Christian churches in Egypt, killing at least 43 people on Palm Sunday.