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Ligo has just seen his most important gravitational wave? | By Ethan Siegel | Start with an explosion! | February 2025

A mathematical simulation of deformed space-time about two fused neutron stars that result in the creation of a black hole. The colored bands are picos and gravitational wave channels, and the colors become brighter as the wave amplitude increases. The strongest waves, which carry the greatest amount of energy, come just before and during the…

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Two new species of Harpactea Bristowe, 1939 from Türkiye (Araneae: Dysderidae)

Two new species of Harpactea Bristowe, 1939 from Türkiye (Araneae: Dysderidae) ABSTRACT Two new species, Harpactea Bozdaglaensis sp. north. and H. Dilekensis sp. north. They are described based on both sexes of the Aegean region of Türkiye. Both species belong to Rubicunda Species group defined for Harpacea Due to the characteristics of the copulatory organs…

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