What did the original rat maze experiments find?
William McDougall's 1920 experiment found first‑generation rats averaged 165 trials to learn the safe exit; by generation 30 the average dropped to about 20 trials, implying a nonstandard form of inherited advantage.
How do examples like the blue tits and crystals support morphic resonance?
Blue tits across Britain independently learned to pierce milk‑foil caps, and some compounds worldwide crystallized suddenly after years of failure — patterns Sheldrake argued reflected an invisible, species‑wide memory that makes behaviors or forms easier once they've occurred elsewhere.
What is morphic resonance according to Rupert Sheldrake?
Sheldrake proposed morphic fields — nonmaterial organizing influences that record patterns of activity and make it easier for similar systems to adopt those patterns in the future, across space and time.
Why has morphic resonance been controversial?
The theory challenges standard biological and mechanistic explanations, lacked mainstream empirical acceptance, provoked intense criticism, and led to reputational damage and even personal attacks on Sheldrake.
Could epigenetics or other conventional mechanisms explain the rat results?
Epigenetics shows some acquired influences can affect descendants via biochemical tags, offering a potential partial explanation, but critics argue it doesn't fully account for rapid, cross‑continental spread reported in some cases; rigorous, reproducible experiments are still needed.
What did the 1984 public experiment suggest about collective learning?
A British TV experiment involving millions of viewers found later solvers performed better than expected, implying that widespread engagement might create a shared memory that helps subsequent individuals, consistent with Sheldrake's prediction.