This photo, taken during the 911 attack in NYC, captures 28-year-old Marcy Borders, a Bank of America employee at the World Trade Center, as she takes shelter in an adjacent office building following the collapse of the South Tower.

About 22,000 to 23,000 years ago, an individual, most probably a young woman, undertook two perilous journeys separated by several hours, carrying a toddler at least once. The trail they left behind, located in present-day White Sands National Park in New Mexico, spans 1.5 km