A new study links long-term melatonin use to higher risks of heart failure and death—doctors explain to Newsweek what it means.

“This year, [cases seem] to be out of control,” said Dr. Allison Agwu, a professor of adult and pediatric infectious diseases at Johns Hopkins University School of Medicine in Baltimore. For example, in Agwu’s state of Maryland, cases are at “four to five times what they saw this time last year,” she said.

You keep your trusty reusable bottle filled with only clear, delicious water. Do you still need to wash it? Experts say reusable bottles get grubby no matter what liquid they're filled with, and it's important to clean them regularly.

Rest in peace, Twitter. X, the platform formerly known as Twitter, will retire its old domain. This comes with a warning for you: If you don't update your account's security settings soon, you could be locked out.