In this week’s new roundup, a new study finds no clear connection between phone use and brain or head cancers, putting some fears to rest. Meanwhile Sweden’s new screen-time guidelines suggest keeping kids under age two away from screens entirely and limiting time for older children—and echo concerns from other countries about how much time young people spend on devices. Also, jellyfish clones are invading lakes in British Columbia, Oregon faces its worst measles outbreak in three decades, and NASA clears up the mystery behind the strange noise on the ill-fated Boeing Starliner spacecraft. Recommended reading: How to Check If You’re Immune to Measles How Worried Should We Be about Starliner’s Stranded Astronauts? When Should Kids Get a Smartphone? E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover! Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.  Learn more about your ad choices. Visit megaphone.fm/adchoices