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Apr
8
comment Why do different humans look different?
Other species have plenty of ways to distinguish each other, often driven by sexual selection. This may even form the basis for speciation, e.g. in birds that are reproductively isolated based on songs.
Dec
29
answered Why did abiogenesis only happen once?
Sep
25
awarded  Yearling
Mar
14
answered How does “be altruist to those who are similar to you” evolve?
Dec
26
awarded  Supporter
Dec
19
awarded  Teacher
Dec
19
answered Are single-celled organisms capable of learning?
Dec
15
awarded  Autobiographer
Dec
15
awarded  Precognitive