ある研究によると、高緯度地方に住む人々は、赤道付近に住む人々に比べて、より大きな目を持ち、視覚情報を処理する脳の能力が高いという。A study suggests that people who live at higher latitudes have larger eyes and more ability in their brains () () () visual compared with () living nearer the equator.
A study suggests that people who live at higher latitudes have larger eyes and more ability in their brains (to) (deal) (with) visual compared with (those) living nearer the equator.
赤道から遠ざかるにつれて、得られる光はどんどん少なくなっていくので、人類はより大きな目を発達させる必要があったのです。() you move away from the quator, there's () () () light available, so humans have had to evolve bigger and bigger eyes.
(As) you move away from the quator, there's (less) (and) (less) light available, so humans have had to evolve bigger and bigger eyes.
これは、グリーランド出身の人もケニア出身の人も細部を認識する同程度の能力を持っているが、高緯度地方の出身の人はより少ない光の量に対処するために、より大きな脳の力と大きな目を必要とすることを示唆している。This suggests that someone from Greenland and someone from Kenya will have the same ability () () detail, but the person from the higher latitude needs more brainpower and bigger eyes () () () the lower light levels.
This suggests that someone from Greenland and someone from Kenya will have the same ability (to) (detect) detail, but the person from the higher latitude needs more brainpower and bigger eyes (to) (deal) (with) the lower light levels.
それに伴って彼らの脳の視覚に関わる部分も広くなっているが、過去の研究で、視覚に関わる部分の広さは眼球の大きさに対応することが示唆されている。They have an associated increase in the size of the visual part of the brain, () () () () () matches with the size of the eyeball.
They have an associated increase in the size of the visual part of the brain, (which) (previous) (studies) (have) (shown) matches with the size of the eyeball.
現代の人類が北極圏までのすべての緯度地域に住むようになったのは、過去１万年ほどの間のことにすぎません。() only within the last 10,000 years or so () modern humans have occupied all latitudes () up to the Arctic Circle.
(It's) only within the last 10,000 years or so (that) modern humans have occupied all latitudes (right) up to the Arctic Circle.
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