Saturday, October 20, 2018

pregnancy birth - Does the colouring of animals depend on what the mother sees before conception?


What is the meaning of the strategies (hishtadlus) that Yaakov made with the conception of the animals starting at 30 (37)?


Is it or was it a natural thing that the colouring of animals depends on what their mother recently saw? If not, what is the implication?




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...