Colombia
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Drug lord Pablo Escobar may be long gone, however he’s still wreaking havoc on his native Colombia thanks to his escaped hippos. Scientists have now discovered there are twice as many as previously thought, and they don't know what to do about it.
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Weird, hypothetical objects called "ploonets" may start life as a moon circling a giant planet, but models show they can be exiled and essentially turn into planets themselves. If true, this theory could explain away some astronomical mysteries.