Sources:
Baikal seals: https://www.pnas.org/content/117/49/31242#:~:text=The%20mean%20foraging%20rate%20per,SI%20Appendix%2C%20Table%20S2).
Killer grandmas: https://www.pnas.org/content/116/52/26669#:~:text=Here%2C%20we%20test%20the%20grandmother,grandmothers%20are%20no%20longer%20reproducing.
