For a few fleeting weeks each winter, the famously elusive cats emerge from solitude, calling across the mountains in search of a mate.

These “walking sharks” can lay eggs without spending extra energy, rewriting what scientists thought they knew about reproduction.

Many films from the Sundance Film Festival in Park City, Utah, are available to stream online starting Thursday through the ...

A new study shows there is a high cost of parenthood, quantifying the 10% “longevity tax” on reproduction. Consequently, mammals that have fewer or no offspring tend to live longer. But why does ...

Scientists at the Max Planck Institute for Biology have discovered a remarkably streamlined strategy for developmental ...

New research shows that epaulette sharks, often called “walking sharks,” can produce eggs without increasing their overall energy use.

Massi rushes down the slope, leaps across a slow-running stream and disappears inside a thick bush. Rosie, his young ...

Why not IVF -- in vitro fertilization? It's a question asked not only by those outside the Church, but sometimes by faithful ...

Lee Robinson's website Before working to improve the quality of working bandogs, Lee pursued accurate information on the ...

Coyotes mate for life, mourn their dead, and even help forests grow, revealing deep emotional lives and vital roles in wild ...

How do dogs improve our well-being? This question was at the center of a study conducted by Dr. Charlie Lea of the University of Brighton in the United Kingdom. Perhaps it should be obvious why these ...