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The sun shining through palm trees in San Diego in this undated photo.

San Diego Reaches 2020 Climate Goals Two Years Early

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.

This Oct. 21, 2009, file photo shows ladybugs on a vehicle in Chatham, Ill.

Massive Ladybug Swarm Over San Diego, SoCal Shows Up On Radar

A huge blob that appeared on the National Weather Service's radar wasn't a rain cloud, but a massive swarm of ladybugs over Southern California.

Comic-Con celebrates its 50th show this summer.

Comic-Con 50 Begins — A Suggested Guide Of Interesting Panels At The Con

Pop culture convention runs through Sunday

Contact tracing involves a painstaking process of identifying and reaching out to all of a COVID-19 patient's recent contacts. In Ireland, Irish Army cadets assist with the contact tracing work in Dublin.

How Contact Tracing Works And How It Can Help Reopen The Country

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.

A popular crosswalk in Shinjuku, Tokyo. Cases of rubella have been reported in Tokyo and other Japanese tourist destinations.

Disease Watch: What Global Travelers Should Know In Summer 2019

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.

CRISPR and other gene technology is exciting, but shouldn't be seen as a panacea for treating illness linked to genetic mutations, says science columnist and author Carl Zimmer. It's still early days for the clinical applications of research.

A Science Writer Explores The 'Perversions And Potential' Of Genetic Tests

Carl Zimmer wondered what secrets lurked in his genetic code — so he decided to have his genome sequenced. He writes about the implications of the study of genetics in She Has Her Mother's Laugh.

For HIV-Positive Babies, New Evidence Favors Starting Drug Treatment Just After Birth

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.

COVID-19 symptoms vary person to person, as does the length of the coronavirus infection. If you're sick, use caution when deciding to leave isolation.

How Long Does It Take To Recover From COVID-19?

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

Tianjin, in northern China, is home to Tianjin University, an international research center that recently hired an American to lead its school of pharmaceutical science and technology. He recruits students from all over the world, he says, and the program's classes are taught in English.

China Expands Research Funding, Luring U.S. Scientists And Students

In a quest to rapidly advance its scientific depth and breadth, China is recruiting scientists from around the world. Some from the U.S. say the greater funding for school and research is freeing.

A female Aedes aegypti mosquito is shown in 2006.

Scripps Researchers Create Disease Detecting Method To Uncover Zika Outbreaks

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

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