Genetics! Now there's a field in its' infancy in my time, though it may be a matter of my country, at well. I will not even pretend to comprehend genetics other than, after a very long lecture by someone significantly smarter than myself back home, understanding my gray eyes are a 'recessive gene' and that is why only two others in my family have it despite our family being rather big. [No really, that is all of his knowledge on the subject.]

From your mouth to God's ears. There were woefully few advances in my time for those in need of a wheelchair or a cane, though the Second World War has left enough in need of them perhaps that shall change. But I noticed that many more buildings here are ones people who use such things could actually enter, instead of stairs being the sole means of entry, and elevators are far more common as well. [Science has been kind to the less fortunate people of the world, and for this, he is glad.]