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In “After the Spike,” Dean Spears and Michael Geruso show why policy, rather than high population density, has the most significant impact on the environment.

65 million years ago, a massive asteroid struck Earth. Not only did Jupiter not stop it, but it most likely caused the impact itself.

A mid-flight scare reveals how embracing death can bring purpose and meaning to everyday life.

Living longer is only half the equation. Here’s how to stay healthier for more of those years.

In this excerpt from “Agents of Change,” Christina Hillsberg tells the story of Martha “Marti” Peterson, the first female case officer stationed in Soviet Moscow.