Russia appears to be about to use a new secret weapon against Ukraine - but it's not a jet or missile, but rather a 75 - year - old biplane ... ... <看更多>

How Japanese samurai swords were made. A 75 - year - old swordsman who has made 1,000 Japanese swords. 7.6M views 3 months ago. ... <看更多>

Question: A 75-year-old woman with hypertension is being treated with a thiazide. Her blood pressure responds well and reads at 120/76 mm Hg. After... ... <看更多>