A tour guide killed at a former Colorado gold mine last year fell out of a crowded elevator taking tourists below ground ...

A tour guide killed at a former Colorado gold mine last year fell out of a crowded elevator taking tourists below ground after apparently not latching its door closed, documents obtained by The ...

(Arthur H. Trickett-Wile/The Gazette via AP, File) DENVER (AP) — A tour guide killed at a former Colorado gold mine last year fell out of a crowded elevator taking tourists below ground after ...

DENVER (AP) — A tour guide killed at a former Colorado gold mine last year fell out of a crowded elevator taking tourists below ground after apparently not latching its door closed, documents ...

DENVER (AP) — A tour guide killed at a former Colorado gold mine last year fell out of a crowded elevator taking tourists below ground after apparently not latching its door closed, documents obtained ...

Immune cells in the brain called microglia can partially break down large amyloid plaques characteristic of Alzheimer's disease by latching on to them, forming a sort of external stomach and ...