In a pair of studies published in 2015, extrapolation from observed extinction of Hawaiian snails led to the conclusion that "the biodiversity crisis is real", and that 7% of all species on Earth may have disappeared already.
Nun par de estudos publicados en 2015, a extrapolación da extinción observada nos caracois de Hawai levou á conclusión de que "a crise de biodiversidade é real", e que o 7% de todas as especies da Terra puideron ter desaparecido xa.