Polar Bear Cubs: Denning, Birth, and the First Year of Life
Polar bear cubs are born at 500-700 g inside a snow den while their mother has fasted for months. Here is how they survive the first Arctic year.
April 2026
December 2024
Why Is Panda Reproduction So Hard?
Panda females ovulate once a year for 24-72 hours. The breeding challenge, AI breakthroughs, and why captive survival jumped from 10% to 90%.
Panda Cubs: From 100 Grams to 100 Kilograms in Two Years
Panda cubs weigh 85-130 g at birth, one of the smallest mother-to-cub ratios in mammals. Here is how they grow from pink blind newborn to independent adult.
November 2024
Grizzly Bear Cubs and Family Dynamics: An In-Depth Look
Grizzly cubs weigh 400-500 g at birth inside a winter den. The first 3 years of life, the mother-cub bond, and why male infanticide shapes family survival.
Brown Bear Cubs: Winter Births and Maternal Bonds
Brown bear cubs weigh 350-500 g at birth mid-hibernation. The mother-cub bond, infanticide risk from boars, and how maternal care shapes survival.
Sun Bears: Cubs, Mothers, and Their Unique Bond
Sun bear cubs are born at 250-325 g in tree hollow dens. The reproduction cycle, the 18-month maternal bond, and the orphan-cub pet-trade crisis.
Spectacled Bear Comparison: Relatives and Species
Spectacled bear cubs are born at 300-400 g in caves or hollow trees. The mating cycle, the cub-rearing year, and how Andean conditions shape family life.
October 2024
Bonding Between Black Bear Cubs and Mothers in Dens
Black bear cubs are born at 200-450 g inside winter dens, then bond with mom for 1.5-2 years. The biology, the cubs of color, and how mothers defend them.