Silvery steelhead migrate to the ocean and return to natal freshwater streams to spawn, a cycle that can be impeded by dams and concrete channels.

Testosterone levels must be "within natal female range... for an appropriate length of time so as to minimise any potential advantage", and hormone treatment must be verified annually.

I’ve seen him reference his natal chart in interviews before, so in anticipation of our meeting — and knowing the museum exhibition might pique his interest — I research my own.

The system does not show sign of a significant "natal kick," an acceleration of the orbiting objects.

"Orangutan males disperse from their natal area during or after puberty over long distances to either establish a new home range in another area or are moving between other's home ranges," explains Schuppli.