Want to regale your friends with some fascinating trivia this weekend? Brush up on the latest studies everyone will be talking about:

• That fitness tracker strapped to your wrist might not be telling the truth. A study presented at a meeting of the American College of Sports Medicine found that while most trackers were accurate for activities like jogging or brisk walking, they underestimated activities like standing or pacing and overestimated things like typing. They may still be worth a try, but don't get too excited when it says you burned hundreds of calories on Gchat. (Source)

• Want to give your brain a workout? Try yoga. A study found that 20 minutes of yoga improves brain function, including memory and the ability to process information quickly. In the study, yoga beat out no exercise (duh) and aerobic exercise (interesting!) in beefing up brainwork. (Source)

• Now there's even more reason to angle for a corner office. Researchers found working near a window helps you move more during the day and sleep better at night. Even if you're stuck in a windowless cube, the study also found that walking outside for lunch or taking a quick walk can have similar effects. (Source)

• Men might be to blame for those hot flashes. Researchers are proposing a new hypothesis for why women go through menopause. From an evolutionary standpoint, they say women only stopped reproducing at an older age because men chose to mate with younger women. There are still plenty of unanswered questions, and the scientists also admit that it's a bit of a chicken/egg scenario: it's also possible that younger women choose older males instead of the other way around. (Source)

• Cable TV = Fewer Kids. But not because everyone's too busy marathoning "Game of Thrones" to make babies. This theory comes from a study of rural villages in India and Brazil that found when these remote regions got cable TV, fertility declined within a year. The theory: women watching soap operas with mostly childless female characters were inspired to have fewer children, themselves. (Source)