Scientist researching time travel should consider using a cellphone to send and receive calls from the future and from the year 1928. It is a research concept I propose at this moment at 12:17pm California on 22 March 2017.
Perhaps using NASA NuStar to send the signals into the black hole at 47 Tucanae x9. Why? If my Psi abilities are accurate this could be the portal that could explain the YouTube video of the Charlie Chaplin cellphone in the year 1928 from the movie The Circus. Keep an open mind and remember that it has not been proven the technology in the excerpt was a radio or hearing aid. It could be our first recorded event of a time traveler or extraterrestrial explorer. Maybe a time-slip can be explored using NASA NuStar with cellphone technologies.
47 Tucanae X9
NASA NuStar records images of radio emissions from a black hole.