Simplify the following text for a Grade 10 native English-speaking person.
Original: In the 1990s developmental biology made a re-entry into evolutionary biology , from its initial exclusion from the modern synthesis , through the study of evolutionary developmental biology .
Simplified: Evolutionary biology is a subfield of biology that studies how species start and change over time or in other words , how species evolve . Someone who studies evolutionary biology is known as an evolutionary biologist .