Every year, hundreds of new skyscrapers are built around the globe. As nations vie for prestige, these shimmering towers are rising higher and higher. But for all their impressive engineering, are these buildings safe?
Your skinny best friend seems to eat twice as much as you, but you're still overweight. Why? For decades, experts thought they had the answer: too many calories and not enough exercise. The latest scientific research is turning those assumptions on their head.