How much money is spent on space exploration per year?

Scientific thinking: what clues about biology might road kill provide?

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."