In the early 2000s Terry Mitchell’s dentist retired. For a while, Mitchell, an electrician in his 50s, stopped seeking dental care altogether. But when one of his wisdom teeth began to ache, he started looking for someone new. An acquaintance recommended John Roger Lund, whose practice was a convenient 10-minute walk from Mitchell’s home, in San Jose, California. Lund’s practice was situated in a one-story building with clay roof tiles that housed several dental offices. The interior was a little dated, but not dingy. The waiting room was small and the decor minimal: some plants and photos, no fish. Lund was a good-looking middle-aged guy with arched eyebrows, round glasses, and graying hair that framed a youthful face. He was charming, chatty, and upbeat. At the time, Mitchell and Lund both owned Chevrolet Chevelles, and they bonded over their mutual love of classic cars.

Updated on April 19 at 1:28 p.m. ET.

There has never been a town like the one San Francisco is becoming, a place where a single industry composed almost entirely of rich people thoroughly dominates the local economy. Much of the money that’s been squished out of the rest of the world gets funneled by the internet pipes to this little sliver of land on the Pacific Ocean, jutting out into the glory of the bay. The city now sits atop a geyser of cash created from what the scholar Shoshana Zuboff calls “behavioral surplus”—the natural resource created from your behavior, which is to say your mind.

Literal colonies of the working poor now cling to forgotten streets in RV communities. Homeless encampments are stitched onto any liminal plot of land. To lose your apartment doesn’t mean moving one neighborhood over but three cities away, to Antioch or Gilroy or Stockton.

The great white shark—a fast, powerful, 16-foot-long torpedo that’s armed to the teeth with teeth—has little to fear except fear itself. But also: killer whales.

For almost 15 years, Salvador Jorgensen from the Monterey Bay Aquarium has been studying great white sharks off the coast of California. He and his colleagues would lure the predators to their boats using bits of old carpet that they had cut in the shape of a seal. When the sharks approached, the team would shoot them with electronic tags that periodically emit ultrasonic signals. Underwater receivers, moored throughout Californian waters, detected these signals as the sharks swam by, allowing the team to track their whereabouts over time.

Let’s get some things straight.

Passover is a springtime Jewish festival celebrating the early Israelites’ exodus from Egypt and freedom from slavery. Jews observe it by hosting a ritual dinner, called a seder, and then by abstaining from eating all leavened bread for about a week. (Some of us abstain from some other stuff, too.) Instead, we eat matzo, a thin, unleavened cracker.

Easter is a springtime Christian holiday celebrating the resurrection of Jesus Christ and freedom from sin and death. It is preceded by a series of holidays commemorating Jesus’s path to the cross. One of these holidays is Maundy Thursday, which, aside from being a great name for a holiday, is a remembrance of the Last Supper, which was a seder. In the United States, many Christians observe Easter by attending a ritual meal between breakfast and lunch, called a brunch.

Gérard Araud, the charmingly blunt French ambassador to the United States, is famous for two things: the lavish parties he hosts at his Kalorama mansion, and his willingness to say (and tweet) things that other ambassadors might not even think, much less state in public.

Araud ends his nearly five-year tenure in Washington today, and when I spoke with him last week, he was, even by his usual standards, direct to the point of discomfort. He told me his view of the U.S. (“The role of the United States as a policeman of the world, it’s over”) and Donald Trump (“brutal, a bit primitive, but in a sense he’s right” on free trade), and he shared his opinions of John Bolton (he’s a “real professional,” even though “he hates international organizations”) and Jared Kushner (“extremely smart, but he has no guts”).

Some trends in higher education move up and down—ebbing and flowing with the economy and demographic shifts. And then there are those that are stagnant, ever-present reminders of the work America’s universities still need to do.

One of those is the problem of faculty diversity: Less than 6 percent of full-time faculty members at institutions across the country are black. Many factors coalesce to bring about that dearth of black faculty, but one of the most significant is the perpetual scarcity of black doctoral-degree recipients.

From 2002 to 2017, of the roughly 50,000 people who earned Ph.D.s each year, the percentage who were black increased only modestly, from 5.1 percent to 5.4 percent, according to data from the National Science Foundation. In 2017, there were more than a dozen fields—largely subfields within science, technology, engineering, and math—in which not a single doctoral degree was awarded to a black person anywhere in the United States.

Special Counsel Robert Mueller’s report has settled—or all but settled—important questions about the Trump-Russia matter.

Did Russia intervene in the 2016 election with the conscious and articulated intent to help elect Donald Trump? Yes.

How important were these interventions to the outcome? Large, possibly decisive.

Did the Trump campaign know that Russia was doing the intervening? From the beginning, cybersecurity experts said Russian hackers had obtained leaked Democratic emails. The Mueller report decisively refutes Julian Assange’s alternative explanation—the lie that WikiLeaks had an “inside source.”

Read: The Mueller report could alienate the voters Republicans need

Did the Trump campaign know of these interventions in advance? Uncertain. Mueller reports that people in and around the Trump campaign frantically sought advance information about WikiLeaks, but the evidence about whether they succeeded has been redacted to protect an ongoing legal matter.

Joe Biden is running. The former vice president will make his candidacy official with a video announcement next Wednesday, according to people familiar with the discussions who have been told about them by top aides.

Seriously, he’s actually made a decision. It’s taken two years of back-and-forth, it’ll be his third (or, depending on how you count, seventh) try for the White House, and many people thought he wouldn’t do it, but the biggest factor reshaping the 2020 Democratic-primary field is locking into place.

He wants this. He really wants this. He’s wanted this since he was first elected to the Senate, in 1972, and he’s decided that he isn’t too old, isn’t too out of sync with the current energy in the Democratic Party, and certainly wasn’t going to be chased out by the women who accused him of making them feel uncomfortable or demeaned because of how he’d touched them.

Updated on April 18 at 4:10 p.m. ET

Attorney General William Barr released Special Counsel Robert Mueller’s long-awaited report on his investigation into Russian interference in the 2016 presidential election on Thursday. Though some of the findings have been redacted, the report will give the public a clearer sense of what the special counsel found—and whether Barr’s short summary, made public in late March, was accurate.

The report covers the special counsel’s investigation into Russian efforts to influence the 2016 election, and details 10 episodes that Mueller’s team examined as part of its inquiry into whether President Donald Trump obstructed justice. Four types of information are redacted in the report, according to Barr: grand-jury material, and details that could jeopardize intelligence sources and methods, ongoing cases, and the privacy of “peripheral third parties.”

Beyond all the revelations about Russian entanglements and possible obstruction of justice, Special Counsel Robert Mueller’s report crystallizes two cardinal rules about governance in Donald Trump’s Washington. One is that Trump will shatter any boundaries of law, morality, or custom in his exercise of presidential power. The second is that Republicans—not only in Congress, but now also in the executive branch—will not restrain any of his excesses. The same holds true for both unwritten rules: They constitute a defining gamble for the GOP in future elections.

Starting with Attorney General William Barr’s staggeringly misleading press conference Thursday about the report, and extending through the blithe dismissal from congressional Republicans of its revelations, the release was yet another demonstration that there may be literally nothing Trump can do that would cause Republicans to break from him. Mueller’s report cataloged dozens of behaviors from Trump and his advisers—from sharing internal campaign polling data and strategy with a suspected agent of a foreign power to repeatedly lying to the public to systematically seeking to thwart investigations—that would have inspired volcanic eruptions of outrage from congressional Republicans and the conservative-media infrastructure if perpetrated by a Democratic president.