Courtesy Pixabay/fraugun| Do the Math
Nothing lasts forever.| Do the Math
Image by naturfreund_pics from Pixabay| Do the Math
Image by günter from Pixabay| Do the Math
Image by Edar from Pixabay| Do the Math
This is the TV poster for “David Attenborough: A Life on Our Planet.” (CNS photo/Netflix)| Do the Math
[Note: This post inspired a podcast interview that traces a similar path.]| Do the Math
From Pixabay/Activedia| Do the Math
From Pixabay (Kranic17/535 images)| Do the Math
As we look toward the uncertain future, it may occur to some among us that we’ll need energy on Mars. How are we going to get it? Presumably Mars has no fossil fuels—although on the plus side its atmosphere is already 95% CO2, compared to Earth’s 0.04%, so they’re likely to be less uptight about carbon emissions on the red planet.| Do the Math