Status Updates From El Universo Elegante

“Einstein realized that hundreds of years of experimental confirmation notwithstanding, special relativity implied that in some subtle way Newton’s theory was broken and that its repair required coming to grips with the question of the true and full nature of gravity”.

Brian is methodical and gives nice long explanation of difficult concepts with examples while also keeping the element of mystery and prose.

“Einstein proclaimed that all objects in the universe are always travelling through spacetime at one fixed speed - that of light… time slows down when an object moves relative to us because this diverts some of its motion through time into motion through space.”

Good start, accessible currently.