The chikungunya virus is rapidly spreading in China. Could it make its way to the U.S.? Meanwhile in Alaska a glacial lake outburst flooded the nearby Mendenhall River to record levels. And in Ethiopia fossilized teeth reveal a new species of Australopithecus—one that possibly lived alongside one of our closer cousins in theHomo genus—shedding light on human evolution.

Recommended reading:
<a href="https://www.scientificamerican.com/article/should-you-worry-the-new-chikungunya-virus-outbreak-in-china-could-reach-the/">How the New Chikungunya Virus Outbreak in China Could Reach the U.S.</a>
<a href="https://www.scientificamerican.com/article/what-is-a-glacier-outburst-flood-alaskas-suicide-basin-explained/">Why Glacial Lake Outbursts like the One in Alaska May Happen More Often</a>
<a href="https://www.scientificamerican.com/article/new-human-ancestor-identified-from-fossil-teeth/">Entirely New Species of Human Ancestor Discovered</a>

Join the #SciAmInTheWild photography challenge for a chance to win a one-year Unlimited subscription to Scientific American—plus an exclusive bundle of gadgets and gear to level up your next adventure. <a href="https://www.scientificamerican.com/anniversary-contest-official-rules/">See the rules for entry here</a>.

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Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Emily Makowski, Shayna Posses and Aaron Shattuck fact-check this show. The theme music was composed by Dominic Smith.  Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices">megaphone.fm/adchoices</a>

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