The trans-Neptunian object Arrokoth, also known as Ultima Thule, which NASA's space probe New Horizons passed on New Year's Day 2019, may have changed its shape significantly in the first 100 million years since its formation. Researchers now suggest that the current shape of Arrokoth could be of evolutionary origin due to volatile outgassing.
from Latest Science News -- ScienceDaily https://ift.tt/30D0RNb
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