Do most individuals die young or live to ripe old ages? Survivorship curves visually answer these demographic questions. Imagine a population of 1,000 individuals born at the same time in the same ...

If nothing is done, extinction is a very real possibility. Researchers reveal troubling findings about whale lifespans: ...

Using these photos, we developed what scientists call “survivorship curves” by estimating the probability whales would disappear from the photographic record as they aged. From these ...