Your message might get stuck with one check mark for several reasons. If the recipient’s phone is turned off or not connected to the internet, WhatsApp can’t deliver the message to their device.

A vector ecologist explains the complexities of tracking tick-borne diseases like Lyme in a climate-changed world ...

This delayed allergic reaction is called alpha-gal syndrome. While it’s commonly called the “red meat allergy,” that nickname is misleading, because alpha-gal syndrome can cause strong reactions to ...

Legacy verified Twitter users have found a temporary fix to get their blue tick back for free — just by adding in a few words to their bio.

Tick check: Here’s what to know about ticks amid continuing wet weather in Sonoma County Ticks thrive in humid and wet environments. In Sonoma and Marin counties, they’re active year-round ...