The book was “On the Origin of Species”. And the challenge was the theory of evolution by natural selection.

这个人就是查理斯•罗伯特•达尔文，这本书叫做《物种起源》，而发起的挑战则是基于自然选择说的进化论。

youdao

According to Darwin's theory, evolution occurs because the environment naturally weeds out the weaker species.

达尔文的理论认为，物种在自然环境中优胜劣汰，进化由此产生。

youdao

The past theory on genetic load starts off with equilibrium of population to investigate the evolution of species on realistic level.

以往的遗传负荷理论从种群平衡出发，探讨现实发生水平上的物种进化。

youdao

Darwin's theory of evolution predicts how different species evolve.

FORBES: Sciences and Medicine

He landed, camped there, left and returned, studied, researched and conceived his earth-shaking theory of evolution, On the Origin of Species, in 1859.

FORBES: Connect

He did indeed develop a theory that species evolve and that the two crucial conditions of evolution were time and favourable conditions, in other words that species adapt to their environment.

BBC: Part Three - France and the World