Are falling sperm counts really an 'existential threat' for humanity?
Are falling sperm counts really an ‘existential threat’ for humanity? Rachel E. Gross The decline has been called a ‘canary in the coal mine’ - Getty Images/iStockphoto Male scientists have long waxed poetic on the contents of their testes. “Sperm is a drop of brain,” wrote the ancient Greek writer Diogenes Laertius. Leonardo da Vinci drew the penis with a sperm duct that connected directly to the spinal cord. The 17th-century microscopist Antonie van Leeuwenhoek claimed that each sperm cell contained within it a folded-up human being waiting patiently to unfurl. F...
Source: msn.com