- In research
- MacArthur's mouse lemur appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
- In technology and industry
- Engineering practice reuses MacArthur's mouse lemur in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
- In the classroom
- MacArthur's mouse lemur is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arboreal mammals, Fauna listed on CITES Appendix I, IUCN Red List endangered species, so understanding it makes those chapters shorter.
- In everyday life
- Look for MacArthur's mouse lemur outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.