red giant” phase. Specifically? He will swell colossally until he the nearest
Planets devoured: Mercury, Venus, and possibly the Earth itself. But let’s be reassured: the sun is now only halfway through its life. It still has five billion years to go. To put things in relation: Modern humanity has existed for about 300,000 years. So we have a comfortable head start. What if Mars were our Plan B? This is where Elon Musk, a great defender of the Marsian colonization, comes in. For him, Mars represents a
