Defining existential and global catastrophic risk

Oil prices continue their upward climb amid conflict in the Middle East. The international benchmark Brent crude is now $115 a barrel; on Friday, it was $105. Brent is headed for its biggest monthly climb ever, and this morning, there are concerns about additional disruptions to oil shipments through another key route. We’ll unpack. Also: a looming helium shortage and a search for ways to mitigate threats to humanity.