Although it may not be obvious, multiple signs point to the planet being in the middle of another mass extinction.
The animal population is decreasing at an alarming rate due to human activities like deforestation and mining. According to a report from the United Nations, the number of species threatened with extinction today could be close to one million, but that’s nothing compared to the number of species that have already been lost throughout the earth’s history.
Click through for facts about 15 animals that have already gone extinct.
