What is the difference between an salamander and a newt?

Answer 1

Here's what Melissa Kaplan says:

"There is little distinction between the amphibians known as "newt" and "salamander." What is called a salamander in the Americas may well be called a newt in Europe. Some apply the name "salamander" to the fully aquatic and fully terrestrial animals, while applying the name "newt" to those animals that live on land from late summer through winter, entering water to breed in the spring. For the sake of simplicity, we well refer to all types as "salamanders."

Answer 2

about two inches and maybe two months of growth