A comet is fast approaching Earth and can easily be termed not "once-in-a-lifetime", but once in "multiple" lifetimes. Its last visit to Earth was in the year 629, which makes it a must-watch for ...

The scientist has a history of making controversial claims about objects from interstellar space. He is well-known for his bold claim that the first interstellar object found, 1I/ʻOumuamua, was an ...