Dillon Marsh’s photographs of sociable weaver nests, taken in the Kalahari Desert of Southern Africa, beautifully illustrate traditional nature–the realm of wild animals–overlapping with human civilization. The apparent bales of hay draped over the tops and sides of telephone poles are home to hundreds of songbirds, which construct and maintain their monstrous nests communally. While [...]

A diseased and emaciated Tasmanian devil (Sarcophilus harrisii) was found last week on a golf course in the town of Zeehan on Tasmania’s west coast. Like many of its kind, the animal suffered from the deadly, transmittable cancer known as Devil Facial Tumor Disease (DFTD), which has wiped out at least 70 percent and possibly [...]

The critically endangered wild Bactrian camel (Camelus ferus) is so rare and lives in such remote areas that it was only recognized (after a few years of scientific debate) as its own species in 2008, decades after China started using one of its few habitats, the the Lop Nur Desert, to test nuclear bombs. Amazingly, [...]

Some weeks back, I came across a case report published in 1999 in the journal Ultrasound in Obstetrics and Gynecology [1]. It presented a twin pregnancy wherein one of the fetuses seemed to be at a younger developmental stage in its mother’s womb compared to its sibling. It wasn’t the first time that I had [...]

Most of us are familiar with a 28-day menstrual cycle, which, divided in half, comprises the follicular phase – that’s when the dominant follicle, or egg, is growing and preparing for ovulation – and the luteal phase – when the endometrium, or lining of the uterus, is preparing for possible conception and implantation. If implantation [...]

Sex costs amazing amounts of time and energy. Just take birds of paradise touting their tails, stags jousting with their antlers or singles spending their weekends in loud and sweaty bars. Is sex really worth all the effort that we, sexual species, collectively put into it? Despite many teenage frustrations and MTV, most biologists think [...]

Stem cells have been coaxed into creating everything from liver cells to beating heart tissue. Recently, these versatile cells were even used to make fertile mouse sperm, suggesting that stem cell technology might eventually be able to play a role in the treatment of human infertility. Now two types of stem cells have been turned [...]

Moss, that cushy, moisture-loving ground cover, is more promiscuous than we thought. These plants might not have the sexy flowers of a peony, but according to new research, they do manage to attract small pollinators with a subtle sweet smell. Previously, scientists had presumed that these primitive plants needed a layer of water for their [...]

The promise of a nice dinner might not always win over a woman, but for some male fish, a tasty-looking lure seems to get the girl pretty reliably. The trick is to make sure the offering resembles the local cuisine and then they can reel in the ladies hook, line and sinker. Swordtail charachin (Corynopoma [...]

Fellas, want a better chance of passing along your genes? Try laying off the fried food. A more healthful diet will not only help you get fitter, but, new research indicates, it might also increase the odds that your sperm are in better shape, too. A whole host of factors might impair male fertility—including alcohol [...]

A study led by Jonathan Tilly of the Massachusetts General Hospital overturns the decades-long idea that women are born with all the eggs they will ever have. It reports that women of reproductive age carry ovarian stem cells, meaning that they can produce new eggs. Tilly’s team, which made a similar finding in mice in [...]

A newly described pointy-nosed, rat-like animal did not just crawl out of some unsuspecting city’s sewers. Rather, this now-extinct species spent its time scampering among prehistoric trees some 160 million years ago during China’s Jurassic period. Its modern appearance might seem unremarkable, but its advanced anatomical features—both internal and external—are exactly what have drawn the [...]

While polar bears flounder in the face of shrinking ice floes, another furry creature has gotten a boost from climate change. In the past three decades yellow-bellied marmots (Marmota flaviventris) have been fruitful—and multiplied—thanks to longer summers, according to a new study. In the Rocky Mountains, these marmots usually hibernate for seven to eight months [...]

Once they’re inside the female reproductive organs, sperm pull out all the stops to outrace their rivals to the egg—especially if the opponent comes from another male. The process that determines which sperm wins, called "postcopulatory sexual selection," has been difficult to tease out, until now. By genetically engineering fruit flies that express green or [...]

Down in the dark depths of the deep ocean live more than a dozen species of “Dumbo” octopuses. These octopods from the genus Grimpoteuthis are so named for their prominent, unusual earlike fins that they use to help them swim (reminiscent of the Disney elephant character who used his ears to fly). These graceful, gelatinous [...]

Today we’re returning to the deep to meet an octopus that, at first glance, hardly seems to earn that eight-limbed designation. Its very name sounds like an oxymoron—or a cautionary tale from a fishing accident. But the seven-armed octopus (Haliphron atlanticus) is a real, bonafide octopod—if a little misleading in its appellation. This deep-ocean octopus [...]

Almost as fast as you can say “go-go-gadget arm,” an octopus can stretch its arm more than twice its normal length—without the help of any cyborg attachments. What’s more, according to new research, female common octopuses (Octopus vulgaris) are able to stretch their arms even more than the males—on average, three times resting length. This [...]

We continue our exploration of the many mysterious octopuses that live far from shore—and the eyes of humans. Today we meet the blanket octopus (Tremoctopus), a genus with four species that, until recently, had only been described based on female specimens. Why? Although they live in the vast open ocean, they are big (up to [...]

Shallow-water octopuses can be difficult enough to find. They camouflage against corals, hide in holes and generally make themselves scarce. But researchers can at least attempt to observe and collect them by snorkeling, diving or skimming nets and bottom trawls. The rest of the vast, dark ocean, however, presents a much larger sampling challenge. So [...]

The octopus is a solitary creature. Most known species of octopus avoid the company their own kind. And you might, too, if you knew your conspecific were capable of cannibalism. So in public aquariums, these animals are usually kept in separate tanks to keep them safe (and to avoid any unsightly encounters in front of [...]

Even moths can’t escape the tribulations of being a virgin. New research by scientists at the University of Utah has revealed that when a male virgin Helicoverpa zea moth picks up the scent of a female, it will stop at nothing to get to her as soon as possible, even if that means taking off [...]