What is the most recent thing that scientists have discovered?

The fastest sperm is not necessarily the one that fertilizes the egg. The egg has selective receptors and allows the fittest sperm to enter, not the one that arrives first.

A study by researchers from Stockholm University, Sweden, and the University of Manchester Trust Foundation, UK, published in the scientific journal The Royal Society, debunks the theory that the fastest sperm can fertilize an egg.

The one who achieves the feat is not necessarily the first to reach the egg, but the one selected by the female reproductive cell through chemoattractants.