You will always find me in the past. i can be created in the present, but the future can never taint me. what am i?

What are the strength and weaknesses of personal entrepreneurial competencies

Some organisms have a large geographic range. for example, the norway rat lives on every continent except antarctica. a population of norway rats is the number of rats in one particular area. do you think it’s scientifically possible for a population of norway rats in north america to carry different genetic mutations than a population of norway rats in africa? do you think it’s possible that they carry some of the same mutations? what types of information can scientists learn by studying the genomes of these two populations of rats?

How do you deal with depression when you're depressed?