In biology, extinction is the termination of an organism or of a group of organisms (taxon), normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence.
Scientists have created a mutant enzyme that breaks down plastic drinks bottles – by accident. The breakthrough could help solve the global plastic pollution crisis by enabling for the first time the full recycling of bottles. The new research was spurred by the discovery in 2016 of the first bacterium that had naturally evolved to eat plastic, at a waste dump in Japan. Scientists have now revealed the detailed structure of the crucial enzyme produced by the bug.
A chill has hit homesolar According to GTM Research’s latest U.S. Solar Market Insight report, Q3 2017 was the third consecutive quarter that the residential solar market fell by installation volume. It's easy to blame the “big three” for this downturn -- collectively, SolarCity, Vivint Solar and Sunrun (excluding Sunrun's channel business) are down 32 percent in installation volume over the first three quarters of 2016, according to the latest U.S. PV Leaderboard. At the same time, we talk about the rest of the market -- the long tail -- as though it were an aggregate force tempering the downfalls of the behemoth big three.