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Butterflies and moths have difficulty adjusting to a rapidly changing climate
climate change biodiversity species
2021/8/4
Climate change exerts great pressure for change on species and biodiversity. A recent study indicates that the few moth and butterfly species (Lepidoptera) capable of adjusting to a changing climate b...
New method may resolve difficulty in measuring universe's expansion（图）
New method difficulty measuring universe
2019/10/23
Astronomers using National Science Foundation radio telescopes have demonstrated how a combination of gravitational-wave and radio observations, along with theoretical modeling, can turn the mergers o...
Computational Difficulty of Computing the Density of States
Computational Computing the Density of States
2010/11/5
We study the computational difficulty of computing the ground state degeneracy and the density of states for local Hamiltonians. We show that the difficulty of both problems is exactly captured by a c...