Saving Monarch Butterflies
Science Underground
English - May 01, 2016 09:00 - 2 minutes - 1.89 MB - ★★★★★ - 35 ratingsNatural Sciences Science Education earth science astronomy biology chemistry physics stem Homepage Download Apple Podcasts Google Podcasts Overcast Castro Pocket Casts RSS feed
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Twenty years ago, there were a billion monarch butterflies. Now, there are less than 10 percent of them left. Their disappearance is linked to a weed.