UFO sightings

Alex Filippenko and Lex Fridman discuss introduction.

Alex Filippenko and Lex Fridman discuss universe expansion.

Alex Filippenko and Lex Fridman discuss dark energy.

Alex Filippenko and Lex Fridman discuss scientific revolutions.

Alex Filippenko and Lex Fridman discuss asteroid hitting earth.

Alex Filippenko and Lex Fridman discuss giant solar flares and the power grid.

Alex Filippenko and Lex Fridman discuss elon musk and space exploration.

Alex Filippenko and Lex Fridman discuss exoplanets.

Alex Filippenko and Lex Fridman discuss traveling close to the speed of light.

Alex Filippenko and Lex Fridman discuss traveling faster than the speed of light.

Alex Filippenko and Lex Fridman discuss intelligent life in the universe.

Alex Filippenko and Lex Fridman discuss fermi paradox.

Alex Filippenko and Lex Fridman discuss finding alien life would be bad news.

Alex Filippenko and Lex Fridman discuss universe expansion speed.

Alex Filippenko and Lex Fridman discuss the universe is infinite.

Alex Filippenko and Lex Fridman discuss what happened before the big bang?.

Alex Filippenko and Lex Fridman discuss roger penrose.

Alex Filippenko and Lex Fridman discuss nobel prize for the accelerating universe.

Alex Filippenko and Lex Fridman discuss supernova.

Alex Filippenko and Lex Fridman discuss the greatest story ever told.

Alex Filippenko and Lex Fridman discuss richard feynman.

Alex Filippenko and Lex Fridman discuss meaning of life.