True friends, most people would agree, are there for each other. Sometimes that means offering emotional support. Sometimes it means helping each other move. And if you’re a superb starling — a flamboyant, chattering songbird native to the African savanna — it means stuffing bugs down the throats of your friends’ offspring, secure in the…
Every year, tens of thousands of young women opt to freeze their eggs, an expensive and sometimes painful procedure. As more Americans postpone childbearing, the numbers are growing. But there are many unknowns: What is the optimal donor age for freezing? What are the success rates? And critically: How long do frozen eggs last? The…
Male domination is the natural order of things, some people say. But bonobos, primates with whom we share nearly 99 percent of our DNA, beg to differ. Bonobos are great apes that live in female-dominated societies, a relative rarity among mammals, especially in species where males are the larger sex. While females are smaller than…
Congratulations are in order for Mommy, a Galápagos tortoise and a longtime resident of the Philadelphia Zoo, who recently became a first-time mother at the estimated age of 100. Mommy, who has lived at the zoo since 1932, laid 16 eggs in November. Four of them have since hatched — the first successful hatching for…
The vast majority of plants are hermaphrodites, with both male and female reproductive parts. Oaks, some orchids, the potted spider plant in your office — they’re all capable of reproducing without a member of another sex nearby. “It makes sense if you are an organism that can’t run around and find mates,” said Deborah Charlesworth,…
In 1889, the naturalist Allan Octavian Hume wrote that he was puzzled by macabre decorations he observed in many birds’ nests: strips of dried snakeskin. “Are birds superstitious, I wonder? Do they believe in charms?” he wrote in “The Nests and Eggs of Indian Birds.” If not, why were so many birds using pieces of…