Why do women have orgasms?

Russia on Tuesday confirmed 21 cases of anthrax, including one fatality, after an unusual heatwave melted permafrost in its remote far north, releasing potentially lethal spores from the soil.

The CDC has issued a new advisory that says pregnant women shouldn't travel to the so-called Zika "transmission area" in Florida and pregnant women who live there should take steps to prevent mosquito bites and sexual spread of the virus.

The Centers for Disease Control and Prevention issued the advisory Monday after Florida Gov. Rick Scott said there are 10 new infections of the Zika virus likely transmitted by mosquitoes, bringing the total in the state to 14.

Zika fears prompted US health authorities on Monday to issue a travel warning for a small section of Miami where local mosquitoes have spread the virus to 14 people, officials said.

"We advise pregnant women to avoid travel to this area," said Centers for Disease Control and Prevention chief Tom Frieden, noting that the virus can cause the birth defect, microcephaly.

When Huanito Luksetic was arrested for growing marijuana to help him cope with multiple sclerosis, he could not have known his struggle would eventually pave the way for Croatia to legalize cannabis for medical use.

A 12-year-old boy has died in an anthrax outbreak in remote far northern Russia while dozens have been hospitalized on suspicion of infection, the region's governor said Monday.

South Korean women and Iranian men are significantly taller than they were 100 years ago but Americans have barely grown, according to a new study Tuesday that reflects nutritional and environmental factors.

Human testing started Monday in Brazil on a controversial anti-cancer medicine that has been distributed in the country for years without having gone through proper trials.

The drug, a synthetic phosphoethanolamine known widely as "the cancer pill," was beginning testing with 10 patients at the Sao Paulo Cancer Institute, the Sao Paulo state health department said.

Europe's medicines watchdog said Friday it has recommended the licensing of the first-ever AIDS prevention pill for the European Union.

Researchers on Tuesday praised progress made towards developing an HIV cure, but said it was impossible to tell when or even if a cure for the devastating epidemic would be found.