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Registration problems have been in the news a lot lately, but some experts worry that fears about casting a ballot could be overblown and hurt voter confidence.

The summer racing season kicks off Wednesday in Del Mar after 30 horses died earlier this year at Los Angeles' Santa Anita Park track.

In a new book, Reshma Saujani of Girls Who Code joins a chorus of voices warning of devastating consequences if girls don't partake in tech — and suggesting girls should be encouraged to take risks.

It's a technique widely used in other countries to slow the spread of infection. Here's how contact tracing works — and how it can help the U.S. start to get back to normal.

The city's annual Climate Action Plan report shows the city is ahead of schedule in reducing greenhouse gas emissions. But while the overall picture appears good, some areas have seen little to no progress.

Michael Honeycutt, the top toxicologist for Texas, is the latest chair of the EPA's science advisory board. But some scientists warn his views align more with industry than with scientific consensus.

From measles to yellow fever to just plain heat, there are lots of risks for tourists. Here's how to take stock of your vacation destination.

Scripps Research Institute infectious disease experts are tracking traveler data to find out where the Zika virus could spread.

If you have COVID-19 or suspect you do, here's what doctors say about what to expect and when you can stop isolating.

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.