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Use of LifeStraw. The original LifeStraw is a plastic tube 22 centimetres (8 + 5 ⁄ 8 in) long and 3 centimetres (1 + 1 ⁄ 8 in) in diameter. [8] Water that is drawn up through the straw first passes through hollow fibres that filter water particles down to 0.2 µm across, using only physical filtration methods and no chemicals.
Men can do the same,” says Alex Robboy, a sex therapist in Philadelphia. Essentially, kegel exercises are a way of contracting the muscles of the pelvic floor, which give you greater control and ...
Parental investment is a key factor in reproductive success since taking better care to offspring is what often will give them a fitness advantage later in life. [4] This includes mate choice and sexual selection as an important factor in reproductive success, which is another reason why reproductive success is different from fitness as ...
Vestergaard is a company headquartered in Lausanne, Switzerland that manufactures public health tools for people in developing countries. Founded as Vestergaard Frandsen in 1957 as a uniform maker, the company evolved into a social enterprise making products for humanitarian aid in the 1990s.
Both women and men are capable of performing extraordinary feats, but there are some things the females of our species do better. Here are 7 of them, according to science. Number 7. Seeing colors ...
JurÅjin, the Japanese god of longevity, one of the Seven Lucky Gods. Longevity myths are traditions about long-lived people (generally supercentenarians), either as individuals or groups of people, and practices that have been believed to confer longevity, but which current scientific evidence does not support, nor the reasons for the claims.
Although most tests show no sex difference, there are some that do. For example, it has been found that female subjects tend to perform better on tests of verbal abilities and processing speed while males tend to perform better on tests of visual-spatial ability and crystallized intelligence.
Emasculation was performed in China on men to create palace eunuchs for the imperial court. [19] The practice dates back to the Shang dynasty (1600–1046 BC) [20] and continued up until 1924, [21] when the eunuch system was abolished by the last emperor of China, Puyi. [22] The last living palace eunuch, Sun Yaoting, died in 1996. [23]
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