This could represent a real problem. There are separate growth charts for weight, height, and head circumference. These simply represent the average weight, height, or head circumference of a ...

and human population growth (e.g., how fast will the human population grow, and what does that mean for climate change, resource use, and biodiversity?). Studying population growth also helps ...

Parents are a competitive bunch. So when the pediatrician whips out a growth chart and ranks baby's height and weight in percentiles, it's easy to wonder if something's wrong. But growth ...