Sperm's lifespan. It takes around 10 weeks for the sperm to reach maturity. Once the sperm is inside the woman's body it can live up to 5 days or even longer under favorable conditions. However, when it is outside the body, it can only survive from few minutes to several hours.
The UX developer role is a discipline under the overall user experience umbrella. This means that to become a UX developer you need to have at least a general understanding of the core UX principles, philosophies, and methodologies.
, UX for life. User Interface is the thing that connects the user and the machine. It's what humans made, so that people can interact with the machine however they want to. The whole point is to make it simple for the user. The designers took examples from nature, and implemented them into the machine.