If ruling out the existence of a soulmate sounds unromantic, the biology of attraction points in the same direction.
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Editorial Expression of Concern: The gene product Murr1 restricts HIV-1 replication in resting CD4+ lymphocytes
When the star eventually releases its outer layers, it shrivels down to its core in what's known as a white dwarf star. At that point, it'll be about the size of Earth.
A widespread bacterial defence system called SNIPE is shown to localize to the cell membrane, where it identifies and cleaves the DNA of infecting phage as it is injected into the bacterial cell.