Earth’s 5 catastrophic mass extinctions, explained
Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing ...
PBS1y
The Current Mass Extinction
Is the biosphere today on the verge of anything like the mass extinctions of the geological past? Could some equivalent of meteorite impacts or dramatic climate change be underway, as humankind's ...
PBS8mon
The Current Mass Extinction
Is the biosphere today on the verge of anything like the mass extinctions of the geological past? Could some equivalent of meteorite impacts or dramatic climate change be underway, as humankind's ...