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Scientists just found 8 strange caves on Mars, perfectly built to shelter life

A team of Chinese researchers has identified eight caves in Mars’ Hebrus Valles that may have been sculpted by water. These ...

We Asked for Environmental Fixes in Your State. You Sent In Thousands.

Readers submitted more than 3,200 ideas for our 50 States, 50 Fixes series. Before the year ends, we wanted to share just a ...