Hard difficulty hints, answers for March 8 PipsLess Than (2): Everything in this space must be greater than 2. The answer is 1-6, placed vertically.
Comets release gases in space when sunlight warms their frozen surfaces. The ice turns straight into vapor and forms a hazy cloud around the comet's head, known as a coma. By measuring the gases in that cloud, astronomers can figure out what ingredients are locked inside the comet's ancient ice.
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Read the full story at The Verge.
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