Astrocytes are the largest and most prevalent type of glial cell in the central nervous system. Astrocytes contribute to formation of the blood–brain barrier, participate in the maintenance of ...

Written for you by our author Ingrid Fadelli, edited by Gaby Clark, and fact-checked and reviewed by Robert Egan —this article is the result of careful human work. We rely on readers like you to keep ...

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in ...

Swiatek aiming to end year on a positive note as WTA Finals spot hangs in balance Iga Swiatek has played at every edition of the WTA Finals since 2021, but with the Pole running out of time to claim a ...

The Professional Tennis Players' Association remains a party in the lawsuit. Ilya S. Savenok / Getty Images The antitrust lawsuit filed in March 2025 against tennis’ governing bodies by the ...

At close: October 16 at 4:00:00 PM EDT ...