A massive crack has opened up on a Yosemite National Park cliff face, raising the risk of a dangerous rockfall and forcing the indefinite closure of part of a popular trail, park officials said. Rock ...

While crack cocaine seems to account for the rise in the murder rate of black youths in the 1980s, as well as more moderate increases in a wide range of adverse birth outcomes, the damaging social ...

One of the most confounding legacies of the crack epidemic is that everyone has heard of crack — we all think we know what we need to know — but few of us actually understand it. That’s not an ...

Crack cocaine is being injected – not just smoked – by a significant number of US drug users, reveals the first large survey of the practice. The phenomenon is particularly worrisome because it is ...