Over the course of Earth’s history there have been 5 mass extinctions. Theses catastrophic events led to the erasure of a diverse number of species. We are now in experiencing Earth’s 6th extinction. The cause of this extinction is us..humans. Kolbert has written an easy to follow, informative and at times funny, book about how humans have drastically changed life on earth. The Sixth Extinction is a fascinating read that will having you pondering our place on earth.