Five times in our planet's history, adverse conditions have extinguished most of life.

Now, scientists say, life on Earth could be in trouble again, with some even saying we could be entering a sixth mass extinction.

No credible scientist disputes that we are in a crisis regarding the speed at which nature is being destroyed.

But could we really be on track to lose most life on Earth?

Human-caused climate change, changes in land use and pollution are rapidly transforming the planet, making it harder for species to adapt and survive.