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| | | Crickets Chirp to Flirt | |
| Male crickets have a different song for every occasion: to advertise their fitness, woo a mate or keep their rivals away. So how do they make all those different chirps? | | |
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| 2019 Was the 2nd-Hottest Year on Record | | Last year's data collected is the latest confirmation from NASA and NOAA that Earth is becoming steadily hotter. The planet is now almost 1 degree Celsius warmer than it was in the mid-20th century. | | |
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| Democratic Candidates Go All In on Climate Crisis at Debate | | With the Iowa Caucuses days away and the Sunrise Movement endorsing Sanders, candidates scrambled to talk climate. It's raising some questions. | | |
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| Fleet Of Cars to Collect Block-by-Block Air Quality Data in Bay Area | | The Bay Area air district is measuring pollutants such as carbon monoxide and particulates that are harmful to human health. | | |
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| NASA's New Space Observatory Discovers Its First Earth-like Exoplanet | | NASA's Transiting Exoplanets Survey Satellite, or TESS, made its first-ever discovery of an extrasolar planet of Earth's size that is also located within its star's habitable zone. | | |
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| | | Newsom Moves Ahead With Plan for Single Delta Water Tunnel |
| | | California's governor has restarted a project to build a giant, underground tunnel that would pump billions of gallons of water from the San Joaquin Delta to the southern part of the state. | | |
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| | | Proponents See Hope For California's 'Hydrogen Highway' in 2020 |
| | | Supporters of hydrogen-fueled cars and an infrastructure to support them say this could be the year when the concept finally makes some headway. | | |
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| | | Here's How Much Better Last Fire Season Was Than the Previous Two |
| | | After two years of catastrophic wildfires in California, the fire season in 2019 claimed fewer lives and less land. What went right? | | |
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