Researchers say they were able to produce 'diamond rain' using fancy plastic and high-powered lasers to recreate the intense conditions of the planets .... Consider this your daily reminder that the solar system is even more awesomely bonkers than you realized: On Uranus and Neptune, scientists forecast rain storms of solid diamonds. The gems form in the hydrocarbon-rich oceans of slush that swath the gas giants’ solid cores. Scientists have long speculated that the extreme pressures in this region might split those molecules into atoms of hydrogen and carbon, the latter of which then crystallize to form diamonds. These diamonds...