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Greater sage-grouse at a lek, with multiple males displaying for the less conspicuous females. In sociobiology and behavioural ecology, the term "mating system" is used to describe the ways in which animal societies are structured in relation to sexual behaviour.
In physics and mathematics, and especially differential geometry and gauge theory, the Yang–Mills equations are a system of partial differential equations for a connection on a vector bundle or principal bundle. They arise in physics as the Euler–Lagrange equations of the Yang–Mills action functional. They have also found significant use ...
The helix of sustainability - the Carbon cycle ideal for manufacture and use The international recycling symbol - not nature identical.. The helix of sustainability is a concept coined to help the manufacturing industry move to more sustainable practices by mapping its models of raw material use and reuse onto those of nature.
Triplex DNA structure. The arrows are going from the 5' end to the 3' end. (Triple-stranded DNA (also known as H-DNA or Triplex-DNA) is a DNA structure in which three oligonucleotides wind around each other and form a triple helix.
Chagas disease, also known as American trypanosomiasis, is a tropical parasitic disease caused by Trypanosoma cruzi.It is spread mostly by insects in the subfamily Triatominae, known as "kissing bugs".
Yang Hucheng joined the Xinhai Revolution in his youth and had become a popular warlord of Shaanxi Province by 1926. Following the defeat of Feng Yuxiang and Yan Xishan in the Central Plains War of 1930, Yang allied himself with the Kuomintang's Republic of China government (the Nanjing Nationalist government), [1] and became commander of the Kuomintang's Northwestern Army.