Here is the happy part: For more than four years, a funky-looking spacecraft did something remarkable. It was in many ways just another robot, a combination of hardy materials, circuits, and sensors with a pair of solar panels jutting out like wings on an insect. But this particular robot has listened to the ground shake on Mars. It has felt marsquakes beneath its little mechanical feet.NASA and European space agencies designed the spacecraft to study these Martian quakes in detail.

Long before it reached your home, even before its tiny components were pieced together in an assembly plant, your phone was already one of the most complex gadgets in the world. It is the product of a delicate supply chain whose every link is forged by competing business and political interests.That chain is starting to rattle and even break, as the global tech industry works to become less dependent on China.

As the year comes to a close, I cannot stop thinking about … a court document. Plaintiffs in Twitter, Inc. v. Elon R. Musk et al. filed Exhibit H just before sunrise on September 29 in Delaware’s Court of Chancery. If you’ve seen excerpts, you probably know it by its street name: Elon Musk’s texts.

In a year during which people tried to adopt a new normal, Atlantic writers and other experts explored the challenges and rewards of trying new things, the meaning of true optimism, and how to find joy even in difficult times.The stories in our pages—print and digital—explored what it means to be human and provided advice for navigating parenthood and relationships, friendships and the workforce, and more.

This is an edition of The Atlantic Daily, a newsletter that guides you through the biggest stories of the day, helps you discover new ideas, and recommends the best in culture. Sign up for it here.Former Russian President Dmitry Medvedev wrote some Twitter fan fiction over the weekend in which he hallucinated the fall of the West and the rise of the Fourth Reich. Elon Musk thought the thread was “epic.” But first, here are three new stories from The Atlantic.

The holidays are a notoriously fraught time for big feelings, loneliness chief among them. In 2017, the surgeon general declared loneliness an American “epidemic,” with “over 40% of adults” in the U.S. suffering from it. Globally, the rates rose even further when the coronavirus pandemic made gathering dangerous.What makes things tricky is that solitude is not the same as loneliness.