human
World Population Hits 7 Billion
Tia Ghose | Oct 31, 2011
Sometime today, Earth’s 7 billionth person was born.
Latitude Affects Human Eye Size
Jef Akst | Jul 27, 2011
People living near the Earth’s poles, where days are often short and light often low, have larger eyes and visual cortices than those closer to the equator.