Everyone from President Donald Trump to Elon Musk is understandably excited at the prospect of humans eventually reaching Mars, but Jeff Bezos says focusing on reaching Mars before first establishing a presence on the moon is an "illusion."

The president recently tweeted that NASA should keep its sights set on Mars, rather than "talking about going to the moon, and Musk, the billionaire CEO of Tesla and SpaceX, says SpaceX will transport humans to the distant "Red Planet" by 2024, two years after the aerospace company plans to land its first unmanned rocket on Mars.