The Reference Guide
What evolution actually claims, the three conditions that make selection inevitable, the forces that are not selection, six lines of evidence, how species split, the milestones of deep time, the misconceptions that will not die, and why it is a live constraint in medicine today. Every quiz here comes from a section of this guide.
Open the Reference GuideThe Quizzes
What Evolution Actually Claims
The narrow technical claim, the three conditions that make selection inevitable, the forces that are not selection, and the misconceptions that do most of the damage.
Start • 7 themesThe Evidence
Six independent lines of evidence — rocks, bodies, embryos, maps, molecules and live experiments — that had every chance to contradict each other and did not.
Start • 6 themesHow One Species Becomes Two
How populations stop exchanging genes — species concepts and their limits, the geography of splitting, reproductive barriers, instant plant species and the messy cases that make the boundaries visible.
Start • 7 themesMilestones in Deep Time
Four and a half billion years in fifty questions, from the first microbes to the first humans.
Start • 6 themesThe Missing Link
Why scientists wince at the phrase — and the transitional fossils, from Tiktaalik to Lucy, that show a branching tree instead of one broken chain.
Start • 7 themesEvolution and God
The history, law and sociology where evolutionary science meets religious belief — from Darwin's own doubts to Kitzmiller v. Dover.
Start • 6 themesEach quiz expands one section of the reference guide into 50 questions grouped into themes. Options are shuffled every time you start, and no question repeats between quizzes. Two deliberate constraints: all four options in a question are kept close in length, so the longest answer is never a giveaway; and where the science is genuinely unsettled — the oldest evidence of life, how much molecular change is neutral, whether ring species hold up as textbook cases — the questions ask for the mainstream position or an approximate range, and the explanation says where the doubt lies.