Happy Tuesday! Jeff Bezos announced yesterday he is going to space next month, and Mark Zuckerberg posted a video of himself training to throw spears. What do the billionaires know that we don’t?

Quick Hits: Today’s Top Stories

• The Food and Drug Administration approved a new treatment for Alzheimer’s disease on Monday for the first time in more than 15 years. Many scientists sharply criticized the agency’s decision, saying there is not enough evidence that the new drug, Aduhelm—which was rejected by a panel of independent experts convened by the FDA in November—is actually effective at slowing the progression of disease.

• The Justice Department announced Monday that it had recovered a majority ($2.3 million) of the $4.4 million in cryptocurrency that Colonial Pipeline paid to its ransomware attackers last month. “Today’s announcement demonstrates that the United States will use all available tools to make these attacks more costly and less profitable for criminal enterprises,” Deputy Attorney General Lisa Monaco said yesterday.

• There is now more carbon dioxide in the Earth’s atmosphere than at any point in human history, according to scientists from Scripps Institution of Oceanography and the National Oceanic and Atmospheric Administration. Last year’s shutdowns had “no discernible impact” on the rate of increase, according to the report.