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Lettuce

Lettuce.
Lettuce (Lactuca sativa) is an annual plant of the daisy family, Asteraceae, often grown as a leaf vegetable, and sometimes for its stem or seeds. Often used for salads, lettuce is also seen in other kinds of food, such as soups, sandwiches and wraps. In addition to its use as a leafy green, it has religious and medicinal significance. World production of lettuce and chicory for 2017 was 27 million tonnes, 56 percent of which came from China. Generally grown as a hardy annual, lettuce is easily cultivated, although it requires relatively low temperatures to prevent it from flowering quickly. It can be plagued by numerous nutrient deficiencies, as well as insect and mammal pests, and fungal and bacterial diseases. Lettuce is a rich source of vitamin K and vitamin A, and a moderate source of folate and iron. Contaminated lettuce can be a source of bacterial, viral, and parasitic outbreaks in humans, including E. coli and Salmonella.

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Transandinomys

Transandinomys.
Transandinomys is a genus of rodents in the tribe Oryzomyini of the family Cricetidae—a grouping of medium-sized, soft-furred rice rats. It includes two species—T. bolivaris and T. talamancae—found in forests from Honduras in Central America to southwestern Ecuador and northwestern Venezuela in South America. The upperparts—brownish in T. bolivaris and reddish in T. talamancae—are much darker than the whitish underparts. Both species are characterized by very long vibrissae (whiskers), but those of T. bolivaris are particularly long. In addition, several other morphological differences distinguish the two, including wider first upper molars in T. bolivaris. Both species live on the ground, are active during the night, eat both plant and animal matter, and construct nests of vegetation. They are hosts to various external parasites. They are in no apparent danger of extinction and have been assessed as least-concern species on the IUCN Red List.

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British nuclear tests at Maralinga

British nuclear tests at Maralinga.
British nuclear tests were conducted at Maralinga in the Woomera Prohibited Area in South Australia between 1956 and 1963. A total of seven major nuclear tests took place at Maralinga, with explosive yields ranging from approximately 1 to 27 kilotonnes of TNT (4 to 110 terajoules). Two major test series were conducted: Operation Buffalo (final test pictured) in 1956 and Operation Antler the following year. One bomb used cobalt pellets as a tracer for determining yield, resulting in rumours that Britain was developing a cobalt bomb. The site was also used for trials of neutron initiators and tests on the compression of nuclear weapon cores and the effects of fire on atomic weapons. It was left contaminated with radioactive waste, and a clean-up was attempted in 1967. A further clean-up was completed in 2000. In 1994, the Australian government paid $13.5 million in compensation to the traditional owners, the Maralinga Tjarutja people. The land was restored to them in 2014.

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