A gentle breeze shimmers through the grass and the babble of the breeding season surrounds me. This patch of water meadows, just across the river Dee from the city centre, invites us to take things easy. But last time I visited I was carrying a petrol-powered leaf blower, helping Julie Rose of the Friends of the Meadows users group and entomologist Clive Washington with their beetle biodiversity survey.
The sperm is the smallest cell in human biology, but also one of the most complex. The egg meanwhile is the largest cell and similarly intricate. Looking further out into the natural world, the diversity of these sex cells, or gametes, is truly remarkable.Most species have two gametes, which we term male and female. "Gametes have two fundamental jobs: to carry resources to nurture the resulting offspring, and to find gametes of the same species and fuse with them.