Earth isn’t the only watery planet in the known universe, but it is the only fiery planet. The sun is mostly hydrogen undergoing nuclear fusion, not fire. And on other planets magma from volcanoes and lightning are also not fire. To get fire, it took billions of years of photosynthesis, which means fire can’t exist without life. And fire and life have been shaping each other ever since.
Paste this code where you want the video to appear.
TV Schedule Filters
Location Help
KET provides PBS national programming for all viewers in our broadcast areas. We use your web browser to confirm your location.
If you're a KET donor, you may watch this content from anywhere in the United States.
We provide online video of PBS national programming for KET viewers. Please allow KET to access your web browser's location to watch this video.
Explore KET
Ad Blocker Detected
It appears your browser is using an ad blocker. In addition to blocking ads, this software affects our ability to properly detect your location, which we must do before allowing access to video content. Please add KET.org to your safe list or disable your ad blocker for the best experience.