Countries around the world are often divided into smaller sections, such as states and provinces. How many are there.
Our ancestors evolved many traits that helped them survive in their environments, and we still have many of those traits today.
Hypothetical questions, like what would happen if everyone on Earth went for an ocean swim at once, are fun to think about. And using math, you can get pretty close to a real answer.
How does the brain understand things?
Imagine walking through a tropical forest as a sweet scent wafts through the air.
Does your dog bark a lot? Or is he one of those quiet pooches who barks only when things get really exciting? Most dogs bark at least a little.
Is it possible to study a black how from inside?
The jet stream can have a big impact on how long a plane ride will last.
All kinds of factors influence the way people talk, including regional variations, age, ethnicity, education level and technology.