who would you say was the greatest teacher that ever excisted? ( Archived) (76)

Tim Leary.......[..aside from his mistake in advocating pot, the narcotic....]

Well, I'd say:

Galileo Galilee,
Italian physicist, mathematician, astronomer and philosopher, best known for his major role in the scientific revolution. An ardent supporter of Copernicanism, he brought about great improvements in the telescope as well as the consequent astronomical observations. He's also credited with discovery of the four largest satellites of Jupiter (named Galilean moons), and the observation and analysis of sunspots. For his contributions to the world of science and astronomy, he is often known as 'Father of Modern Observational Astronomy', 'Father of Modern Physics' and 'Father of Modern Science'.

Sir Isaac Newton,
one of the most renowned physicists of all times, he's also credited as a great mathematician, astronomer, natural philosopher, alchemist, and theologian. Through his Philosophiæ Naturalis Principia Mathematica, he laid down the groundwork for most of classical mechanics. He also described universal gravitation and the three laws of motion, used in science till date. Newton also laid down the principles of conservation of both momentum and angular momentum, built the first practical reflecting telescope, developed the differential and integral calculus (along with Gottfried Leibniz) and contributed to the study of power series.

And of course

Albert Einstein,
some of the famous teachers of the world have set him as a role model by living the life of a whiz kid and making unparalleled contributions to the prosperity of mankind. Albert Einstein is one great personality remembered for his works in the field of physical science. The German-born theoretical physicist is the inspiration to many aspiring teachers in the world. The mastermind of special relativity and general relativity, Einstein is not just the role model for teachers, but also an inspiring personality for students of science.

And last but no way least:

Ayn Rand,
she was a Russian-American novelist and philosopher. Her more famous novels include the following 'Atlas Shrugged', 'The Fountainhead', 'Anthem' and 'We The Living'. Ayn Rand died on March 6, 1982, leaving behind the legacy of her brilliant work. She shot to fame with her best-selling novels and by developing a philosophical system called 'Objectivism'. Even today her works are admired by people all over the world.

Are you saying the climate doesn't change? Have you ever heard of the last Ice Ages? To deny Climate change is to deny there ever was an Ice Age.

emmm some say Buddha Shakyamuni was the fourth Buddha to appear
Buddha is a word in the very old Nepalese and Indian languages Pali and Sanskrit which means "Enlightened one". The word "Buddha" often means the historical Buddha named Buddha Shakyamuni (Siddhartha Gautama),
but "Buddha" does not mean just one man who lived at a certain time. It is used for a type of person, the equivalent of a prophet, and Buddhists believe there have been many - that there were Buddhas a very long time ago and there will be for a long time in the future.

Maitreya Buddha

After a great many ages the life expectancy of humans will grow enormously and then slowly decrease again until the human lifespan is about a hundred years. According to the prophesies of all the Buddhas and his own promise, this will be the time when Maitreya Buddha will appear in this world as a universal teacher.