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A new analysis of a small rock called the Hypatia Stone, presumed to be a fragment from a comet, reveals that it might either be from outside the Solar System, or older than the Sun itself.

Discovered in 1996 in the same region of the Eastern Sahara as the odd phenomenon known as Libyan Desert glass, a 2013 analysis of the Hypatia Stone discovered that it was of extraterrestrial origin, and was hypothesized to be a fragment of a cometary nucleus. However, a new analysis has found that the stone’s odd atomic composition doesn’t even match any known meteorite samples, implying that it is either from outside the Solar System, or it predates the formation of the Solar System itself.
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Two new studies have added new evidence to the theory that a major airburst from a meteor or comet occurred over North America, ushering in a 1,400-year cooling period called the Younger Dryas that occurred between the Pleistocene and the Holocene eras. The Younger Dryas saw the extinction of most of the large land mammals across North America, and also the end of the Clovis People, a Paleo-Indian culture. A charred layer of soil, found at roughly 50 Clovis sites across the continent, suggest a massive wildfire that raged continent-wide, possibly caused by such a massive meteor strike.
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 A new asteroid was discovered by the Wide-Field Infrared Survey Explorer (WISE) mission in November of 2016, designated 2016 WF9. While the mission finally decided to designate the object as an asteroid a few days later, 2016 WF9 presented an interesting puzzle: while it appears to be a comet in structure, it also lacks the dust and gas cloud that is characteristic of what we expect from comets.
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