Einstein's 1905 fundamental idiocy (time SLOWS DOWN for the moving clock) taught by Neil deGrasse Tyson:

http://abcnews.go.com/Entertainment/...ry?id=32191481
Neil deGrasse Tyson: "We have ways of moving into the future. That is to have time tick more slowly for you than others, who you return to later on. We've known that since 1905, Einstein's special theory of relativity, which gives the precise prescription for how TIME WOULD SLOW DOWN FOR YOU if you are set into motion."

https://www.youtube.com/watch?v=n2s1-RHuljo
Neil deGrasse Tyson: "One of the towering great achievements of the human mind in our understanding of the universe is Einstein's theories of relativity. (...) It makes only two assumptions: that the speed of light in a vacuum is constant no matter who is doing the measurement and no matter in what direction you are moving or how fast. You always get the same measurement for the speed of light. That's Assumption 1 which by the way the experiment has shown to be true. Assumption 2... (...) Given those two tenets, extraordinary spooky phenomena derive from them. For example: As you travel faster (...) time ticks MORE SLOWLY FOR YOU than it does for other people who are not."

No such phenomenon derives from the two tenets (assumptions). The phenomenon that does derive is:

As you travel faster, time ticks FASTER FOR YOU than it does for stationaries (you see your clock running FASTER than stationary clocks).

Neil deGrasse Tyson is silly but David Morin is not and accordingly he is well aware what exactly derives from the two tenets (assumptions):

http://www.people.fas.harvard.edu/~djmorin/chap11.pdf
Introduction to Classical Mechanics With Problems and Solutions, David Morin, Cambridge University Press, Chapter 11, p. 14: "Twin A stays on the earth, while twin B flies quickly to a distant star and back. (...) For the entire outward and return parts of the trip, B does observe A's clock running slow..."

Even Einstein abandoned his 1905 fundamental idiocy in the end and in 1918, after having discovered that his new (general) theory can serve as perfect camouflage, found it safe to teach the correct conclusion from his 1905 postulates (time SPEEDS UP for the moving clock, as judged from the moving reference frame):

http://sciliterature.50webs.com/Dialog.htm
Albert Einstein: "During the partial processes 2 and 4 [the outward and return parts of the trip] the clock U1, going at a velocity v, runs indeed at a slower pace than the resting clock U2." [Note: In Einstein's paper U2 is actually the moving clock and U1 is the resting one, but since in this quotation things are judged from the moving reference frame, U1 is said to be "going at a velocity v" while U2 is called "resting".]

Pentcho Valev