In part one of a two part interview, Avi Loeb of Harvard details the Galileo Project's expedition to search for spherules of material on the ocean floor from the first known interstellar meteorite. Avi details the unique nature of the material, why he thinks it is of interstellar origin and if it could be pieces of alien technology.

Discovery of Spherules of Likely Extrasolar Composition in thePacific Ocean Site of the CNEOS 2014-01-08 (IM1) Bolidehttps://lweb.cfa.harvard.edu/~loeb/Interstellar_Expedition.pdf

Interstellar: The Search for Extraterrestrial Life and Our Future in the Starshttps://www.amazon.com/Interstellar-Search-Extraterrestrial-Future-Stars/dp/006325087X

Extraterrestrial: The First Sign of Intelligent Life Beyond Earth https://amzn.to/2LiIxoo affiliate link

Loeb, A., 2018, "Six Strange Facts About`Oumuamua", Scientific American: https://arxiv.org/abs/1811.08832

Bialy, S. & Loeb, A., 2018, "Could Solar Radiation Pressure Explain ‘Oumuamua’s Peculiar Acceleration?", ApJ, 868, 1: https://arxiv.org/abs/1810.11490