Epithelial cells form a layer in which an apical surface is exposed to the external environment and to other forms of stress in ducts in specialized organs. As such, epithelial cells require robust ...

December 22, 2025 • The DOJ has released more files related to convicted sex offender Jeffrey Epstein. And, NPR finds a rise in the number of immigrants without legal status who aren't showing up to ...

Carol M. Kopp edits features on a wide range of subjects for Investopedia, including investing, personal finance, retirement planning, taxes, business management, and career development. Somer G.

I always miss my dog while I'm on vacation, but after traveling with her a few times, I know her well enough to know that it's not really her thing. Unfortunately, this means leaving her behind, but ...