Imagine someone with very short hair, for some reason, wanted it long and wasn't going to wait for it to grow back; or use wigs, weaves, extensions or the like.

Would it be possible to take a strand--be it human hair, horse-hair, or nylon--and either laser weld it to the stubby hair from the scalp, hair by hair, or glue it?

A binary glue might be needed. After all, on one hand, you want it to dry quickly, yet on the other, this process would take hours.

At, let's say, 5 seconds per hair, 2 stylists could do it in about 80 hours.

For those with tinning hair, one might use artificial hairs that "fork."

Ideally, one can comb, shampoo, swim, etc, even vigorously, without (more than normal) hair loss.