Anew, sixth global mass-extinction event appears to be occurring on earth today. the most likely explanation for the dramatic loss of species is

The new and sixth global extinction event that is occurring on earth today is due to human activity that alters natural environments. People remove forests, pollute rivers, and do other things that alters how animals and plants live, this reduces the numbers of species and accounts for the dramatic loss that leads to a global mass extinction.

Ithink its because more have died recently than in the past.