Make some noise for safety with our favorite alarms, from keychain sirens to wearable bracelets.

A wearable bioelectronic device increased REM sleep in real-world trials without invasive surgery or medication. A restless night can leave more than fatigue behind. REM sleep plays a central role in emotional processing, stress adaptation and mental recovery, and persistent disruptions to this stage have been linked to conditions including depression, anxiety and post-traumatic stress [...]