CNN Health

The idea of time travel has always fascinated me.

Everyone benefits when there is less air pollution, but it pays off more for older communities with high poverty rates and those where larger populations of Black people live, regardless of income, a new study finds.

Renee Martray of South Carolina has severe and permanent corneal scarring resulting in vision loss. She says it's like trying to peer through eyeglasses that have been dipped in oil.

Four sea otters in California have died from a rare strain of the Toxoplasma gondii parasite that scientists said could pose a risk to human health.

Deadly spores lurk in the water and infect the skin of the creatures they touch. Spreading on contact and then invading the body, this fungal disease causes ulcers and peeling so severe skin comes off in sheets.

A California bill seeks to ban the sale of foods with red dye No. 3 and other ingredients linked to cancer and other health issues.

Scientists have created mice with two biologically male parents for the first time — a significant milestone in reproductive biology.

Finding early signs of dementia in the back of the eye may be a way to catch the disease early and start preventive treatment, a study says.

Abstaining from food and drink from sunrise to sunset during Ramadan is difficult for some Muslims with eating disorders, who feel they are neglecting a key part of their faith.

Nikki Lawson received the shock of her life at age 35.

The rate of children diagnosed with autism in the United States has been growing steadily since 2000, but two new reports from the US Centers for Disease Control and Prevention highlight disparities in the types of children identified to have autism spectrum disorder and setbacks in early detection.

Bacteria from meat could be responsible for more than half a million urinary tract infections in the United States every year, a new study says.

Many of the first responders who helped fight the fire that erupted after the train derailment in East Palestine, Ohio, last month were ill-equipped and untrained to fight the massive chemical blaze that some now call "the hell fire."

Tuberculosis cases reported in the United States appear to be returning to levels seen before the Covid-19 pandemic, according to a new report from the US Centers for Disease Control and Prevention.

The scrutiny of some Big Tech and social media platforms is running high as TikTok's CEO faces grilling before lawmakers. Emma Lembke, 20, is among those taking action against what she sees as the harmful effects of social media on her generation.

A wolverine was spotted this week by people fishing on the Columbia River near Portland, according to the Oregon Department of Fish and Wildlife.

People who are vaccinated or who take Paxlovid during a Covid-19 infection have a lower risk of developing long Covid, new research shows.

In 2017, 'Oumuamua became the first observed interstellar object to zip through our solar system, and its appearance sparked questions scientists are still trying to answer.

Startup Relativity Space sent what it's calling the "world's first 3D-printed rocket" toward space on Wednesday, vaulting it into the upper reaches of the atmosphere. Though, it suffered an engine issue after launch and failed to reach orbit.

Synthetic opioids, primarily the powerful drug fentanyl, are the main driver of sky-high overdose deaths in the US. CNN Medical Analyst Dr. Leana Wen explains what makes fentanyl so dangerous and what can be used to reverse its effects.