The orca is one of the few mammals to go through menopause. Research suggests why: Grandmothers boost the survival of their grandcalves.

Life’s tough for the hardworking whale
So sometimes they have to avail
Of help from their nan
As only she can
Ensure that the youngsters prevail

John Moynes

Pic: Centre For Whale Research

Sponsored Link
Sponsored Link
Broadsheet.ie