Students presented projects at the 70th Greater New Orleans Science and Engineering Fair last week. Here, we highlight a few.

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.

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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 ...