After reading my books and posts on twin development, twins have reached out to me asking for help understanding their anger, fear, or just plain unhappiness with their twin. Certainly, it is not ...

Avoiding promoting twin alikeness is crucial, even though most people think that twins should be copies of one another.

Harley-Davison motorcycles are known for their use of big V-twin engines. The company's proprietary engine design has come a long way since the introduction of the first 49.5 cubic-inch version in ...