On July 20th, 1976, Viking 1 became the first robotic lander to land on Mars.

On September 3rd, its sister Viking 2 followed suit.

Both of them carried experiments to test for biology on Mars, something which no subsequent Marslander has since replicated.

The results from these chemical experiments have divided researchers for decades and have been the cause of one of the greatest

debates in planetary science. Learn more about if we have already found

evidence of life on Mars on this episode of Everything Everywhere Daily. This episode is sponsored by Scotty Vest.

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if you remember back to my previous episode on the history of Mars exploration,

sending probes to Mars has been really hit or miss. It turns out that

sending a robot to land on the surface of another planet

is really, really hard. That is why it was such a big deal when the Viking One

Lander managed to safely touch down on the surface of Mars on July 20th, 1976. It was the first time

humans had safely landed on the red planet. A few months later, an identical

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