Be sure to follow Neil deGrasse Tyson on Twitter. He comes up with gems like this.
Good advice, for sure.
Neil deGrasse Tyson, born October 5, 1958, hold many titles. Astrophysicist, cosmologist, author, and science communicator. This American scientist has been, since 1996, the Frederick P. Rose Director of the Hayden Planetarium at the Rose Center for Earth and Space in New York City. American Museum of Natural History is the umbrella museum where Tyson founded the Department of Astrophysics in 1997 and has been a research associate in the department since 2003.
Neil has also been featured on many TV shows, news & entertainment segments, and more.
If I ever met a Space Alien, I'd resist shaking its extended appendage, not knowing for sure the details of alien anatomy.