CNN Health

Jupiter's icy moon Europa is an ocean world encased beneath a thick crust of ice -- a place where snow floats upward.

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Getting sick from Covid-19 is bad enough. What if you're one of the unlucky people who experience what is called long Covid? It's a medley of symptoms that can occur months -- and even years -- after recovering from Covid, according to a new study of more 1 million people from eight countries.

The James Webb Space Telescope is using infrared light to reveal otherwise invisible aspects of the universe -- and capturing stunning imagery in the process.

An asteroid from space slammed into the Earth's surface 66 million years ago, leaving a massive crater underneath the sea and wreaking havoc with the planet.

After one young player hugged another in a beautiful moment on ESPN, parents may wonder how they can raise a child to be similarly willing to take that risk of offering affection, comfort and support in such a public forum. Psychologist John Duffy shares guidance.

Boston Children's Hospital, which calls itself "home to the first pediatric and adolescent transgender health program in the United States," says it has faced a "large volume" of threats of violence for offering that kind of care.

Most monkeypox cases in the current outbreak have been linked to sexual activity, but research published Wednesday by the US Centers for Disease Control and Prevention offers new insight into other ways it may be spreading.

A tiny fish that lives in the icy waters off the coast of Greenland may be unassumingly small, but scientists have found it's exceptional in more ways than one.

On second thought, maybe don't pass the salt.

Big changes are coming to the United States Centers for Disease Control and Prevention, which recently celebrated its 75th anniversary as the nation's lead public health agency.

The Artemis I mega moon rocket has arrived at the launchpad -- and this time, it's for liftoff on a journey around the moon.

Last week, the US Centers for Disease Control and Prevention announced key changes to its nationwide Covid-19 guidelines. Among them was the end of required quarantine after someone is exposed to a close contact with the coronavirus. The CDC also revised isolation guidance for people infected with Covid-19.

Two human cases of West Nile virus have been reported in New York as the virus has been detected in a record number of mosquitoes in the city, health officials said Tuesday.

About three months into the ongoing monkeypox outbreak in the US, there are more than 12,000 cases and counting.

The US Food and Drug Administration announced on Tuesday it has finalized a rule allowing people over the age of 18 with mild to moderate hearing impairment to be able to purchase hearing aids over the counter.

The Biden administration has been planning for how to get past the crisis phase of the Covid-19 pandemic and will stop buying vaccines, treatments and tests as early as this fall, White House Covid-19 Response Coordinator Dr. Ashish Jha said on Tuesday.

Almost 100 years after its extinction, the Tasmanian tiger may live once again. Scientists want to resurrect the striped carnivorous marsupial, officially known as a thylacine, which used to roam the Australian bush.

The first possible case of human-to-dog transmission of monkeypox -- recently reported in two men and their pet in Paris -- had been a theoretical risk up till now, said Dr. Rosamund Lewis, technical lead on the monkeypox response for the World Health Organization.

While no human crew will travel aboard NASA's Artemis I mission, that doesn't mean the Orion spacecraft will be empty.