A new study says the mystery object is likely a remnant of a Pluto-like world and shaped like a cookie. Arizona State University astronomers reported this week that the strange 148-foot (45-meter ...

A new study says the mystery object is likely a remnant of a Pluto-like world and shaped like a cookie. Arizona State University astronomers report the strange 45-metre object appears to be made ...

A study published in March 2021 says the mystery object is likely a remnant of a Pluto-like world and shaped like a cookie. (William Hartmann and Michael Belton via AP) CAPE CANAVERAL, Fla.