One of the biggest stories over the weekend was the discovery of a baby wooly mammoth found frozen in Siberia. Dug up by an unlikely paleontologist--a reindeer herder--the mammoth is on display in Japan and is being tested for clues as to how it died. By sampling tiny air bubbles in its lungs, Japanese scientists hope to discover what the atmosphere composition was like when the mammoth froze--which would offer insight into climate change over historic time.

Speaking of Japan, a tiny island (actually a tuft of rock) off the coast of Hiroshima seems to be literally going to pieces. The cause? Small crustaceans locally known as nanatsuba-kotsubumushi are boring by the millions into the rock. As the oval invertebrates carve out nests in the island, the rock succumbs easily to wind and erosion. Although the island, named Hoboro, was recorded to be 72 feet high in 1928, it now stands pitiably at 20 feet.

In Central America three new salamander species have been discovered, and you can view photos here.

"A cheerful heart is good medicine," and research continues to support Solomon's conclusion. A study in the American Journal of Epidemiology found that people in happy moods had lower average levels of cortisol--a hormone thought to contribute to high blood pressure and suppress the immune system. Among happy women, the study found lower levels of two proteins that accompany inflammation throughout the body. So, as Jesus said, "Don't worry." Keep a cheerful heart and it may just improve your health.