Imagine traveling back in time and observing the oceans of 5 million years ago. Suddenly, and without warning, an enormous creature erupts out of the depths.
Because transportation generates more than one-fourth of the CO2 emitted by burning fossil fuels, slashing CO2 emissions requires phasing out vehicles powered by gasoline, diesel and natural gas.
Astronomers have discussed the Moon illusion for centuries, and there are some facts they all agree on.
To better understand why plastics don't biodegrade, let's start with how plastics are made and how biodegradation works.
Human fascination with animals goes back as far as humans do.
To catch their food, octopuses use lots of strategies and tricks.
If you look closely at a key, you'll see its top edge has a bunch of V-shaped valleys. If you inspect the key more closely, perhaps with a ruler, you'll notice the bottoms of these valleys are equally spaced.
Sometimes it may seem that humans have altered the Earth beyond repair. But our planet is an incredible system in which energy, water, carbon and so much else flows and nurtures life.