Hamilton W J, Heppner F
Science. 1967 Jan 13;155(3759):196-7. doi: 10.1126/science.155.3759.196.
White zebra finches exposed to artificial sunlight used an average of 22.9 percent less energy after they were dyed black. The hypothesis that black homeotherm coloration functions primarily to maximize absorption of radiant solar energy is suggested. This hypothesis may explain the dark skin pigmentation of certain human populations.
暴露在人造阳光下的白色斑胸草雀被染成黑色后，其能量消耗平均减少了22.9%。这表明了一个假设，即黑色恒温动物的体色主要功能是最大限度地吸收辐射太阳能。这一假设可能解释了某些人类群体的深色皮肤色素沉着现象。
