Emily Kwong and Regina Barber of NPR's Short Wave talk about a comet visiting from interstellar space, caterpillars that eat and break down plastic, and how animals' sense of smell varies by altitude.

The "wax worm" can eat and digest plastic, which is similar in molecular structure to the beeswax the caterpillar usually eats. If you purchase a product or register for an account through a link on ...

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It's time now for our science news round up from Short Wave, NPR's science podcast. I'm joined by the show's hosts, Regina Barber and Emily Kwong. Hello, you two. EMILY KWONG, BYLINE: Hey, Ari. REGINA ...