<p> REVIEW: TITLE Natural populations adapt to novel environments by evolving new functions or structures. A natural question is whether such adaptations can be reversed by returning the population to its ancestral environment Answer to the Natural Question of Tan, L. and Gore, J. (2012), left without answer in the Scientific Article: SLOWLY SWITCHING BETWEEN ENVIRONMENTS FACILITATES REVERSE EVOLUTION IN SMALL POPULATIONS Published in Evolution, 66: 3144–3154. doi: 10.1111/j.1558-5646.2012.01680.x</p><p>Adaptation to the environment is fixed by natural selection over many generations and characterised by genetic changes (Taiz, L. and Zeiger, E. (2010). To survive, plants also respond directly to environmental changes by altering their physiology or morphology without new genetic modifications but by phenotypic plasticity which represent non permanent changes of the individual that can be reversed if the prevailing environmental conditions change (Debat and David, 2001). So was the answer almost already found before the question was asked by Tan, L. and Gore, J?</p><p>I open today, August 6, 2013, the discussion with all Scientists of the whole World. I am dying of a criminal chronic arsenic-antimony poisoning Happened when I was sharing my knowledge of Modern languages in London. For my pupils, I can now diagnose and treat so that Arsenic Is no more the perfect weapon for the perfect crime.</p><p>I cannot work in a lab or do experiments as the arsenic has caused a terrible immune system disease. So let us do like Aristotle and use our knowledge to prove it. Answers accepted in French, German, Dutch, Italian, Spanish, Polish and Would love to say Chinese Mandarin but I am only in year 2 with a memory problem caused by a wrong treatment. This Review will be my Project Work for the year six 2013-2014 at Canterbury Christ Church University. With thanks, Brigitte Verhauwaert </p>