Editor’s Note: This article is part of our coverage of The Atlantic Festival. Learn more and watch festival sessions here. The vaccine timeline for young kids is looking a little more solid. This morning, Pfizer submitted data to the FDA showing that its COVID-19 vaccine is effective and safe for children ages 5 to 11. And this afternoon, the company’s CEO, Albert Bourla, said that trial results for even younger kids, aged 2 to 4, will be available in a couple months’ time.

Studying sea slugs in the group Sacoglossa can mean being on the receiving end of some very imaginative emails. Sidney K. Pierce, of the University of South Florida, retired a few years ago. “But to this day,” he told me, “I get questions from little kids in their science classes” who have stumbled upon the marvelous mollusks—and want to know if they could help “end world hunger.”The answer, Pierce assured me, is no.

Editor’s Note: This article is part of our coverage of The Atlantic Festival. Learn more and watch festival sessions here. A week after FDA and CDC advisory committees clashed on the nuances of when and whether to recommend COVID-19 booster shots, Anthony Fauci told my colleague Ed Yong that he still believes third doses of the mRNA vaccines are crucial, suggesting once again that they will eventually be part of a standard regimen.

This is an excerpt from The Atlantic’s climate newsletter, The Weekly Planet. Subscribe today.One theme of this newsletter is that the world’s physical infrastructure will have to massively change if we want to decarbonize the economy by 2050, which the United Nations has said is necessary to avoid the worst effects of the climate crisis.

Chalk up one more anomaly to These Unprecedented Times: Something genuinely weird is happening on an NFL broadcast. For this season of its marquee Monday Night Football program, ESPN is airing an additional broadcast featuring the brothers and retired Super Bowl–winning quarterbacks Peyton and Eli Manning.