Number of acres of Texas' Big Bend National Park--a portion known as the Christmas Mountains--being auctioned off. The rare move could put state wildlife preserves in the hands of a private buyer
Percentage of Texas land protected on the state or federal level
Number of tigers in India's reserves and jungles, which reflects a 40% drop in the past five years. The Indian government says it plans to recruit soldiers to patrol tiger sanctuaries
Price a tiger pelt can fetch in China
Percentage of Americans age 50 or older with a household...