A remote island may hold clues for the future of El Niño and La Niña under climate change, and how pressure in the blood sends messages to neurons   First up, researchers are digging into thousands of years of coral to chart El Niño’s behavior over time. Producer Kevin McLean talks with Staff Writer Paul Voosen about his travels to the Pacific island of Vanuatu to witness the arduous task of reef drilling.   Next on the show, host Sarah Crespi talks with Veronica Egger, a professor of neurophysiology at the Regensburg University Institute of Zoology, about an unexpected method of signaling inside the body. Egger’s work suggests the pulse of the blood—the mechanical drumming of it—affects neurons in the brain. The two discuss why this might be a useful way for the body to talk to itself.   This week’s episode was produced with help from Podigy.   About the Science Podcast   Authors: Sarah Crespi; Kevin McLean; Paul Voosen    Episode page: https://www.science.org/doi/10.1126/science.z1hqrn2