How do sleep trackers work, and are they worth it? A sleep scientist breaks it down

By Dean J. Miller, Senior Lecturer, Appleton Institute, HealthWise Research Group, CQUniversity Australia

Many smartwatches, fitness and wellness trackers now offer sleep tracking among their many functions.

Wear your watch or ring to bed, and you’ll wake up to a detailed sleep report telling you not just how long you slept, but when each phase happened and whether you had a good night’s rest overall.

Surfing is done in the ocean, planes fly in the sky, and sleep occurs in the brain. So how can we measure sleep from the wrist or finger?

The gold standard of sleep measurement

If you’ve ever had a sleep study or seen someone with dozens of wires attached to…

Read complete article

~	Drone footage captured orcas crafting tools out of kelp – and using them for grooming

~	Sharks freeze when you turn them upside down – and there’s no good reason why

~	Human Rights Council hears concerns over displacement, genocide risks and migrant trafficking

~	Gulf States want no winner in the conflict between Israel and Iran

~	Presidents of both parties have launched military action without Congress declaring war − Trump’s bombing of Iran is just the latest

~	Canadian community foundations rally to support local news, calling it essential to democracy

~	More women are using medical cannabis – but new research shows barriers push some into illegal markets

~	Work, wages and apprenticeships: sifting for clues about the lives of girls in ancient Egypt

~	Inaccurate and misogynistic: why we need to make the term ‘hysterectomy’ history

~	It’s time to face an uncomfortable truth: maybe our pampered pets would be better off without us