There are a few common rules about bear safety everyone should know. One key rule? Never run away from a bear. In addition to putting on bursts of speed up to 40 mph, some bears can sustain speeds of ...

In America, speed is most often thought of in terms of miles per hour (mph). But when answering the question of how fast does a bullet travel, it’s best to think of speed in feet per second (fps).

Missiles of various types have been around for ages, but the concept of a cruise missile, or a self-propelled guided missile, first surfaced in the early 20th century. Granted, the technology has come ...

Small-cell lung cancer is an aggressive type of lung cancer. It usually spreads to distant organs before it’s diagnosed. Tumors may double in size roughly every 1–7 months. SCLC tends to be aggressive ...

Measuring the pace of evolution is tricky, but some species can evolve as quickly as a few generations. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

Back in 2014, when Gareth Bale was in his first season at Real Madrid and in his speedy pomp, a statistic did the rounds. Someone, somewhere had clocked Bale as running at 26.8mph when he scored that ...

More research is needed to truly understand how fast endometriosis grows. Here’s what we do know. “The growth rate of endometriosis varies dramatically between individuals,” says Hugh Taylor MD, ...