Transcript: Newton’s master work is the universal law of gravity. Newton’s law of gravity states that every object in the universe, every particle, every planet, every star, every galaxy, attracts each other with a force that is proportional to each of the masses of two objects and inversely...

Transcript: Tycho Brahe is one of the most colorful characters in the history of astronomy. He was born into an extremely poor family and at a young age was essentially bought by his uncle, a nobleman, and so he grew up in wealth. Then, as a teenager he was lucky enough to rescue the king of...

Transcript: We tend to think of the Renaissance in terms of developments in art and sculpture in the 15th century, mostly in Italy. But the Renaissance had its start several hundred years earlier in the 13th century, and it really started in Spain with the rediscovery of ancient Greek...