"Moon Trees" are starting to grow on Earth. They got that name because as seeds they spent some time in space.

Scientists are looking at the ways humans change the planet — and the impact that has on the spread of infectious disease. You might be surprised at some of their conclusions.

Powerful synthetic opioids and drugs like meth and cocaine still flood U.S. communities, fueling historically high overdose deaths.

When Amylyx Pharmaceuticals found out its ALS drug Relyvrio didn't work, the company took the unusual step of voluntarily pulling it off the market.

Rick Slayman, who in March became the first living person to receive a kidney from a genetically modified pig, has died. One of his doctors talks about what was learned from the historic transplant.

A new study warns that millions of people around the world who are 69 years or older will be at risk of dying in heat waves by 2050.

The state covers basic services for vulnerable residents, including things like air purifiers for kids with asthma. But nonprofits offering the services struggle to work within the health care system.

Telehealth accounts for 19% of all abortions, new research finds. And while the number of abortions did plummet in ban states, overall abortions across the country are up.

Ukraine struggles to repel a Russian offensive along the northeastern border. President Biden is to announce new tariffs on Chinese imports. Gangs from China and Mexico flood U. S. with fentanyl.

Two new studies show fentanyl smuggling has increased dramatically despite efforts to target the cartels and tighten border security.