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After age 40, many people notice vertical ridges forming on their fingernails. These ridges, or longitudinal striations, run from the cuticle to the tip of the nail and are often harmless signs of aging. Like other parts of the body, nails undergo structural changes over time. One key reason for these ridges is a slowdown…

Tokyo, Japan – Japan has been rocked by the most powerful earthquake in 140 years, leaving a trail of destruction, anguish, and an entire country in a state of emergency. The 8.9 magnitude quake struck early Tuesday morning, with its epicenter off the country’s northeast coast, near Miyagi Prefecture. The tremor, which lasted more than…