If many bats are sending out similar sound waves at the same time, their signals can overlap. (National geographic photo) Bats rely on echolocation to move through the dark and hunt insects. They send out high-pitched sound waves that bounce off nearby objects and return as echoes which helps them judge where things are.But when…

Most people get pushed toward picking one lane early on, one career, one identity, one clear answer to give whenever someone asks what they do. Kal Penn, the actor and former White House official, simply never accepted that framing. “Growing up, I always had two interests and two passions,” he said, “one being public service…

Representative Image of the recovery of Macquarie Island’s wildlife and seabird populations (AI-generated image) Macquarie Island, a windswept strip of land halfway between Australia and Antarctica, spent nearly two centuries under siege from animals that were never meant to be there. Sealers and whalers introduced cats, rats, rabbits and mice to the island in the…

Muhammad Ali (Image: Wikipedia) Fame gave Muhammad Ali one of the largest platforms of the twentieth century, and he chose, deliberately, not to use most of it to talk about his own charity work. “I try not to speak about all the charities and people I help, because I believe we can only be truly…