Among any and all creatures in this world that could be considered living, including people, there is an universal truth: We die.
But not all of us go through the gradual (and eventually rapid) process of self-destruction that we think of ageing.
Scientists at Calico, a research firm under the umbrella of Google parent company Alphabet, have been studying more than 3,000 mole rats for years.
Armed with detailed birth and death records, they created a model of how likely an individual rat would be to die at any given point along its lifespan.
Rats did die every so often, but the researchers couldn’t find any spike in the risk of dying as rats got older.
The oldest mole rat at the end of the study period was a smidge over 30.