Martin Hayes & Dennis Cahill Erin Baiano/Courtesy of the artist hide caption

itoggle caption Erin Baiano/Courtesy of the artist

Seeds of fear? To most of us, cantaloupe and horn melon look like a healthy breakfast or snack. But the clusters of seeds can evoke anxiety, nervousness and even nausea for some trypophobes. Daniel M. N. Turner/NPR hide caption

itoggle caption Daniel M. N. Turner/NPR