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...DNA - packaged into twenty three chromosomes. At the tip of the sperm's head is a package that contains enzymes that break down protective layers on the egg's surface. Not all human sperm cells look the same. Some have two heads or no heads, some have huge heads, some have small tails or no tails, others may be bent at right angles, or have spiral tails. Many of the...

...DNA hadn’t been sequenced in the thirties, scientists knew about “hermaphrodites” back then. Prior to 1936, there were two intersex athletes who had competed as female and then changed to living as male – Mark (formerly Mary Louise Edith) Weston and Zdenek (formerly Zdenka) Koubkova – who were cited by Avery Brundage when he called for sex verification rules in...

...DNA India: Rio 2016: India's Paralympic medallists to get prize money equal to Olympic medal winners Money has been something of a worry in the run-up to the Games Last week, there was still a cloud over the Paralympics as the event had run out of money and had huge swathes of unsold tickets. The #filltheseats campaign formed on social media to try to address the problems...