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December 14, 2018

The James Webb Space Telescope is a decade late and billions of dollars over budget. But astronomers are already setting their sights on its successors. Plus, second-grader Nina Del Bosque wants to know about stinging caterpillars and their role in the ecosystem.

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23:35

Mysteries Of The Heart

In "Heart: A History," cardiologist Sandeep Jauhar writes of confounding cases of heart disease, and the daring treatments that revolutionized how we fix the human heart.

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