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'Some of them have accuracy that's close to zero': Experts unpack the promise and pitfalls of genetic tests aimed at consumers Live Science spoke with a bioethicist and sociologist about emerging genomic technologies, including those that enable parents to "score" and "select" IVF embryos.
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A tan woman wearing sunglasses with long hair applies a dot of sunscreen to a young tan boy who scrunches up his face in response. A beach with toys is blurred but visible in the background.
Mineral sunscreen leaves an annoying white cast on skin — this new formula could change that Scientists have developed a new approach to formulating mineral sunscreen that could prevent it from leaving a white cast on the skin.
An illustration of a 3D transparent blue human body with red lines showing the nerves in the head and neck, with a blue human brain behind them
Sleep deprivation harms the gut via the vagus nerve, early study reveals New research reveals that sleep deprivation sends aberrant signals through the vagus nerve, triggering a serotonin surge that can kill gut stem cells.

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Two women are resting between exercises while sitting on a park bench outside and looking at their fitness trackers

Best fitness trackers for beginners 2025: From Apple Watch to Garmin Forerunner 165

By Lloyd Coombes last updated

Buying guides These are the best beginner-friendly fitness trackers you can buy in every category, from Apple Watch and Garmin Forerunner 165 to Amazfit Active

Buying guides
Our expert reviewer testing the workout features on the Garmin Fenix 8 smartwatch

Best fitness trackers 2026: From smart rings to multisport GPS watches

By Andrew Williams, Anna Gora last updated

Buying Guide These are the best fitness trackers you can buy in every category, from Amazfit Balance and Garmin Fenix 8 to Whoop MG.

Buying Guide
Xiaomi Smart Band 9 being worn by our reviewer

Best budget fitness trackers 2026: Cheap but mighty

By Maddy Biddulph, Anna Gora last updated

Buying Guide These are the best budget fitness trackers you can buy in every category, from Fitbit Inspire 3 and Xiaomi Smart Band 9 to Garmin Forerunner 165.

Buying Guide
A picture of our reviewer's IQAir Atem Earth air purifier standing in the middle of a living room

We tested the 'first wooden, sustainable air purifier' and it's a thing of beauty

By Anna Gora published

Reviews The IQAir Atem Earth is the most elegant, eco-friendly air purifier we have ever tested, and we absolutely love it for that. It is by no means flawless, though.

Reviews

Diagnostic dilemma: 83-year-old man's unusual form of syphilis had an 'uncertain' source

By Sophie Berdugo published

A man went to the emergency room after being in and out of hospitals for a month, and doctors found a surprising explanation for his illness.

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Viruses, Infections & Disease
An illustration of a 3D transparent blue human body with red lines showing the nerves in the head and neck, with a blue human brain behind them

Sleep deprivation harms the gut via the vagus nerve, early study reveals

By Sahana Sitaraman published

New research reveals that sleep deprivation sends aberrant signals through the vagus nerve, triggering a serotonin surge that can kill gut stem cells.

Sleep
A tan woman wearing sunglasses with long hair applies a dot of sunscreen to a young tan boy who scrunches up his face in response. A beach with toys is blurred but visible in the background.

Mineral sunscreen leaves an annoying white cast on skin — this new formula could change that

By Victoria Atkinson published

Scientists have developed a new approach to formulating mineral sunscreen that could prevent it from leaving a white cast on the skin.

Health
A little girl smiling while brushing her teeth with an electric toothbrush

Best electric toothbrushes for kids 2026: Fun, effective and tested by experts.

By Joanne Lewsley last updated

Buying Guide These are the best electric toothbrushes for kids, from Oral B Kids and Philips Sonicare for Kids to AutoBrush Sonic Pro.

Buying Guide
A 3D illustration of two chromosomes, with the larger X chromosome on the left with its four ends dipped in yellow to show the telomeres, while the shorter Y chromosome is to the right.

Many men lose their Y chromosomes as they age. It may shorten their lives.

By Jenny Graves published

A researcher explores why men lose their Y chromosomes in cells as they age and the health implications associated with this loss.

Genetics

Vaccine denial sets Americans up for more chronic illness

By Janna K. Moen, Christine Miller published

Opinion Despite well-established links between pathogens and chronic illness, the U.S. government continues to weaken public health measures to treat and prevent infectious diseases — a strategy that will ultimately make Americans even sicker.

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Opinion
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