The Download: planet hunting, and India's e-scooters

Plus: The Trump administration has laid off thousands of federal health workers. The pendant on Rebecca Jensen-Clem's necklace is composed of 36 silver hexagons entwined in a honeycomb mosaic. At the Keck Observatory, in Hawaii, just as many segments make up a mirror that spans 33 feet, reflecting images of uncharted worlds for her to study. Jensen-Clem, an astronomer at the University of California, Santa Cruz, works with the Keck Observatory to try to detect new planets without leaving our own. It's a pursuit that faces a vast array of obstacles, for example wind, and fluctuations in atmospheric density and temperature. At her lab among the redwoods, Jensen-Clem and her students experiment with new technologies and software to help overcome the challenges, and see into space more clearly.