Some of the reasons for the surge are expected — heavy rainfalls create lots of pools where mosquitoes can breed. But there are some surprising factors, like the Zika virus.

The vaccine project is in very early stages, but it's sparking interest among scientists in the field.

Doctors used to worry that antiretroviral drugs were too powerful for HIV-positive newborns. More evidence is emerging that, in fact, early treatment can be safe and effective.

Every day, as many as 500 babies in sub-Saharan Africa are born with HIV. A study out of Botswana finds that if newborns are given treatment right away, the virus becomes almost undetectable.

Childhood vaccines are often subsidized in the poorest countries. But not for those moving up the wealth ladder.

A new study in Brazil finds that urban apartments have more diverse fungi — some healthy, some potentially not — than villages in the Amazon rainforest.

A new study of Syrian teen refugees finds the poverty of their current lives may cloud parts of their thinking more than the experience of war.

Fewer children are dying globally, but a new study finds geographic disparities still exist within many countries.

A new review of research on the Zika virus since 2016 finds there is still much scientists don't understand about the pandemic — including when another may strike.

Picture a hairless, wrinkly rodent about the size of a small sweet potato — kinda cool, kinda weird. They also are extraordinarily long-lived. Researchers are lining up to study their secrets.

Picture a pinkish, hairless, wrinkly rodent about the size of a small sweet potato. Researchers are studying naked mole rats to figure out what they can learn about longevity and health.

By breeding and migrating earlier, some birds are adapting to climate change. But it's probably not happening fast enough for some species to survive, according to new research.

Scientists hoping to get more diversity of ancestry among medical research volunteers need to grapple with the history of medical exploitation, says a Columbia University bioethicist.

A new study from the Florida Keys shows that a lot of the stress on corals comes from local sources, providing hope that community action can help save them.

A new study finds that Snowball, a dancing cockatoo, has a repertoire of at least 14 different dance moves, suggesting that the predisposition to dance is embedded in our animal brains.

A researcher made the discovery after ordering monarchs from a breeder. To help them, experts recommend planting milkweed.

Scientists are using old spy satellite images to measure the effects of climate change. They're finding that glaciers in the Himalayas are melting twice as fast as they were a few decades earlier.

Humans have been smoking pot to get high since the first millennium B.C. Archaeologists have found early evidence of cannabis use from wooden bowls exhumed from ancient tombs in western China.

Doctors who feel burned out are more likely to cut back on hours or leave medicine entirely. This costs hospitals and health care organizations billions each year, new research finds.

In Antarctica, researchers have found patches of life, sustained in large part by droppings from seals and penguins. Changes in those populations could have ripple effects down the ecosystem.