Pros: 1  Works equally well in open terrain, under cover or in a gym. 2  Accurate on flat or hilly terrain and when making quick, sharp turns (e.g., when trail running or on an indoor track). 3  Lightweight design is sleeker than most GPS-enabled SDMs.
Definitions for mass extinction. Here are all the possible meanings and translations of the word mass extinction. Wiktionary(0.00 / 0 votes)Rate this definition: mass extinction(Noun) A sharp decrease in the total number of species in a relatively short period of time.
The fifth one was 65 million years ago, when the dinosaurs vanished. Today we're losing biodiversity at a similar rate. And this is, of course, an anthropogenic mass extinction. The primary cause is human communities. But what we're trying to do in extinction studies is to think about scale in different ways.