A chemical in the body is measured by its half-life, or how long it takes for 50% of the substance to leave the body. Caffeine has a half-life of about six hours (0.25 days).

The discovery of an unknown organelle inside our cells could open the door to new treatments for devastating inherited ...

8 minutes, 19 seconds: Inside one California man’s dying body as Narcan molecules rush to reverse an overdose A battle fought in silence and darkness plays out about every day in San Diego County.

Experts working in the Tomb of Cerberus in Giugliano, an area in Naples, unsealed a 2,000-year-old sarcophagus. Inside they found the remains of a shockingly well-preserved body lying face-up and ...