Among sharks and rays, species within the first four million years of existence are significantly more likely to go extinct than older species, according to a study led by researchers from the University of Zurich based on fossils from the last 145 million years. This shows that in addition to environmental stressors, the evolutionary age of species also plays a crucial role in their survival.

Teeth. Ocean. Predator. These are the three most common words used to describe sharks, according to a new global survey published in Wildlife Research, eliciting 1000 different text responses.

First-of-its-kind assessment in seven marine parks in Ecuador, Costa Rica, Colombia and Mexico finds bountiful ocean predator populations in remote areas—and worryingly few predators in protected areas closest to coastlines.