Humans have quite large brains for their body size. One of the evolutionary questions is "why did such big brains, which consume a lot of calories evolve?" What data does the article use to explore the question as to why we evolved such large brains?

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?