In this week’s edition of The Prototype, we look at water on Mars, how new technology could end animal testing, a possible vaccine for HIV, and more. You can sign up to get The Prototype in your inbox here . A Martian glacier seen from the Mars Reconnaissance Orbiter NASA

A lthough there are many who dream about one day living on Mars , there’s been one challenge to plans for eventually settling on the Red Planet: access to water, which would be vital for any kind of community. But new findings show that water might be easier to find than expected. It turns out that Martian glaciers, once thought to be mostly rock intermixed with ice, are actually over 80% ice in regions across the planet’s surface.

In trying to figure out the puzzle of Martian glaciers, the researchers beh

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