Medicine has advanced basically because the changing times also means there are changes in research, more knowledge about a certain field in medicine or procedure in medicine will mean advancement and refinement of it.
But medicine has not really advanced gradually since prehistoric times. From the earliest times until the late 19th/early 20th century, medicine advanced very little and even the most expensive and famous doctors simply did not know what caused most diseases nor what could effectively cure them.
It was only with the discovery in the late 19th century of the link between poor hygiene and infections and Infectious Diseases, of x-rays and anesthetics that started to make careful surgery possible and of pennicillin in the 20th century (to mention just a few) that medicin began making big advancements. Today it is the enormous amount of research and development by universities and pharmaceutical companies that keep the pace of development going.
Yes, since dinosaurs. Scientist have found fossilized ants.
Yes. The advances in science since 2300+ years ago (when Aristotle lived) are huge. Science is constantly advancing. It has advanced since yesterday.
Slavery has existed since prehistoric times. We don't know exactly when or where it started.
There is really no official date of when Ireland was discovered. That is because humans have been living there since prehistoric times.
Since you are not giving a date, it is hard to say. There were many famines in the history of Europe, and black bread might have been one of the things in short supply. Black bread has been available in Europe since prehistoric times, and I doubt there was ever a time in history when there was none at all.
Yes, in prehistoric times they wrestled nude.
No such thing as Prehistoric art. They communicated by drawing on rocks. They built things as altars. But since we know about it, it's not prehistoric, it's historic.
they had wings
All the planets are prehistoric (meaning they predate written history) since all of them are 4.5 billion years old.
it has advanced and it has advanced and advaced
lead has been known about since prehistoric times
Yes, and they have done so since prehistoric times.
Yes, since dinosaurs. Scientist have found fossilized ants.
People in India have swum since prehistoric times.
Boomerangs have been made by humans since prehistoric times.
Nobody 'discovered' France. It is inhabited since prehistoric times.
The site of Madrid has been occupied since prehistoric times.