It's time for "Nerd News," covering the most important news for your brain you may have missed over the last few days. Here's a quick rundown of this week in science . . .
1. A team of scientists at the University of Richmond taughtrats how to drive tiny cars to collect food, and they appear to really enjoy it. They measured the rats' stress hormones, and found that learning to drive made them more relaxed. (Here's avideo.)
2. Google announcedit achieved "quantum supremacy." In just a few minutes, a special quantum computer was able to do a complex math equation that would have taken days on a regular computer. News about it leaked last month, but Google made it official on Wednesday.
3. A studyin the journal"Pediatrics"found the high school sport that causes the most concussions is football. And in second place . . . cheerleading.
4. And some big health stories in the news this week: The first drug provento slow down dementia is ready and should be released in the next year or two. A second strain of polio hasbeen eradicated worldwide, and there's only one strain left to go. And a newgene-editing treatment could be used to correct 89% of genetic defects.