july 1945

LAS VEGAS—Swing past Caesars Palace; head up the Bellagio’s driveway, where its famous fountains are erupting to an auto-tuned Cher hit. Walk by the Dale Chihuly glass-flower ceiling above the check-in line, and the animatronic exhibit with the half-human, half-monkey figures. Head past the blackjack tables and the jangling slot machines and the chocolate fountain to the austere concrete corridors beyond them. There, getting wheeled around in a red metal-frame wheelchair is the 80-year-old man on whom the unity of the Democratic Party in 2020—if not the Democratic nomination—may hinge.

If he can stay alive that long.

Harry Reid, who retired in 2017 after representing Nevada for 30 years in the U.S. Senate—a dozen of them as chair of the Democratic caucus, eight of them as Senate majority leader—was supposed to be dead already; his pancreatic cancer was forecasted to prove fatal within weeks. But he’s still here, which is how I came to be talking with him, not long before Thanksgiving, in a conference room at the Bellagio, asking him why he remains the person to whom many of the Democratic presidential candidates come for advice and anointment.

It was the best of times, it was the worst of times. Television in 2019 offered up sweet birthday babies and hot priests; exposed nuclear cores and examined injustices; giant octopuses and the king of edible leaves, His Majesty the Spinach. It was a year in which more than 500 original scripted series were estimated to air—a new record signaling a television landscape that’s more abundant but also more fragmented than ever.

With that in mind, this year’s “best of” list, like last year’s, tries to recognize shows that did specific things particularly well. Some were brand new; some have already been canceled. But most of them came into being because someone took a chance on an odd idea, a risky concept, or a distinctive voice. As the streaming wars heat up, none of these series feels like a safe bet, which is precisely what makes them so worthwhile to watch.

In the 1960s, doctors counting the number of chromosomes in human white blood cells noticed a strange phenomenon. Frequently—and more frequently with age—the cells would be missing the Y chromosome. Over time, it became clear this came with consequences. Studies have linked loss of the Y chromosome in blood to cancer, heart disease, and other disorders.

Now a new study—the largest yet of this phenomenon—estimates that 20 percent of 205,011 men in a large genetic database called the UK Biobank have lost Y chromosomes from some detectable proportion of their blood. By age 70, 43.6 percent of men had the same issue. It’s unclear exactly why, but the authors think these losses might be the most glaring sign of something else going wrong inside the bodies of these men: They are allowing mutations of all kinds to accumulate, and these other mutations could be the underlying links to cancer and heart disease.

For a little NASA spacecraft, the weather outside is frightful.

The Parker Solar Probe is on a mission toward the sun. The spacecraft has been exposed to scorching temperatures and intense sunlight as it draws closer with every loop around. Eventually, Parker will glide through the star’s outer atmosphere and feel the toastiness of nearly 2 million degrees Fahrenheit (more than 1 million degrees Celsius).

Parker is dressed appropriately for the journey. It wears a thick, custom-made shield to protect its scientific instruments and systems, and tubes with flowing water to cool itself down. Inside, it is a cozy 78 degrees Fahrenheit (26 degrees Celsius). Since it set out last summer, Parker has made three sweltering passes of the sun, with many more still to come in the next five years. And its findings are already surprising scientists back home.

The internet has some feedback on Peloton’s holiday ad campaign. The fitness-tech company, famous for its $2,400, Wi-Fi-enabled stationary bikes that let riders stream spin classes, debuted a new television commercial in mid-November, but it didn’t become infamous until earlier this week, when Twitter got ahold of it.

In the ad, a young mom gains confidence in the year after her husband buys her a Peloton for Christmas—or, at least, that’s what the ad seems to be aiming for. The commercial documents the woman (who is also documenting herself, via her phone’s front-facing camera) while she gets up early day after day to exercise or jumps on the bike after work. At the end, she presents the video of her exercise journey to her husband. “A year ago, I didn’t realize how much this would change me,” she tells him. “Thank you.”