Megafauna Extinction & De-Extinction

Activities to try

1. 1

   In-role debate with a palaeogeneticist (and a conservation ethicist)

   Why it works: A science question ('can we / what caused it?') and an ethics question ('should we?') are distinct; informed people disagree for good reasons; a learner can stake and defend a reasoned position rather than wait to be told the answer.

   1. Interview a character playing a palaeogeneticist who reads mammoth DNA from permafrost and runs a de-extinction project; begin with the 'whodunit': as humans spread into new continents, many giant mammals vanished — in some regions (e.g., North America) around the time the last Ice Age was ending and warming, but in others (e.g., Australia, roughly 40,000+ years ago) well before that, while Africa lost comparatively few. Ask which was the main driver where, and press for evidence.
   2. Challenge feasibility with concrete questions: 'Is that a real mammoth, or just an elephant gene-edited to be cold-adapted?', 'Why can't you clone it exactly from the DNA you recovered?'
   3. Challenge the ethics: 'What happens to the first calf?', 'Wouldn't that money save species alive today?', 'Who decides whether we do this?'
   4. Optionally stage a second character — a de-extinction advocate versus a conservation ethicist — hear both, then state and defend your own position in your own words.
   5. Answer the turned-back question: 'We may be able to do this soon — tell me, SHOULD we?' State at least one strong argument for and one against, and name what remains uncertain.
2. 2

   Weigh the evidence: continent timelines of humans, climate and extinction

   Why it works: Competing causal hypotheses can be weighed against actual evidence (timing correlations across landmasses), and the data often support interacting causes rather than a single villain.

   1. On a map/timeline per continent, overlay human-arrival dates, climate records for the relevant period (including, but not only, end-of-Ice-Age warming), and the timing of megafauna decline.
   2. Judge where the patterns fit the overkill hypothesis, where they fit the climate hypothesis, and where a combination best explains the data, using a balance meter that weighs overkill vs climate vs combination.
   3. Write a short claim naming, for a chosen continent, which evidence pattern you find most convincing and why, and state what evidence would change your mind.
   4. Use a 'de-extinction toolkit' diagram that lays out the genetic steps and the gaps between them to explain why recovered DNA does not yield an exact clone.
3. 3

   Explore the evidence pieces (introductory scaffold)

   Why it works: Orients learners to the key pieces — hypotheses, ancient-DNA limits, and the shape of the ethics debate — as preparation for argument construction.

   1. Tap a permafrost-preserved mammoth to reveal what ancient DNA can yield (genetics, diet, relatedness) and why it degrades over time.
   2. Tap argument cards to reveal substantive points for and against de-extinction (restore ecosystems, scientific learning, reversing harm vs animal welfare, novel-organism risks, diverting conservation funds, hubris).
   3. After revealing the pieces, close the screen and reconstruct from memory: the two hypotheses, one line of evidence for each, what ancient DNA tells us, and one argument on each side of the ethics.