The 6th EXTINCTION

We're living it up o the Cenozoic (mammal time) because there's been no mass extinction event to allow for a major change in life. However it's quite difficult to tell when things are changing in the Geologic sense, so maybe we are in the 6th Mass Extinction right now.

Some scientists think we've entered a new Epoch the ANTHROPOCENE.
Scientists disagree whether or not this has started, but we could be in the End/Beginning of a new period of life. Here's the SciShow's summary.