and that Phobos and Deimos accreted locally from disk material. Reaccumulation of disk material into rubble piles naturally leads to the formation of a collection of a dozen of moons (Rosenblatt and Charnoz2012
D.TheMilkyWaydidn’texistatthattime, 64.Whyhaven’tbeingsfromspacevisitedusyet accordingtoShostak A.They’reafraidofus.B.It’ salongwayaway. C.Theydon’twanttoseeus.D.Theydon’ t know how to use radio signals. 65. What does the underlined phrase “life forms” in the last paragraph ...