This is tied closely with what happened to the Martian atmosphere. Mars has very little air now, just 0.6 percent of Earth’s atmospheric pressure. That’s too low to support liquid water on the surface: Water boils are lower temperatures in thinner air — where I live in Colorado water boils at about 94° C (200°F). Mars must have had a much thicker atmosphere back in the day, three or more billion years ago, to be able to have standing liquid water on its surface without it all boiling away.
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Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: A New Arduino MicroPython Package Manager, How-Tos and Much More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey