Category Archives: Animals

How Do Other Animals Deal with the Umbilical Cord and Placenta When the Baby is Born?

Brandi N asks: How do other primates deal with the umbilical cord and placenta when the baby is born when they don’t have any sort of medical help to make sure everything’s handled right? Other than certain modern humans, some marine mammals (like whales and dolphins), chimpanzees and a few domesticated animals, mammal mothers typically eat the afterbirth. While most […]

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Do Fish Sleep?

Ryan K. asks: Given that they probably need to move their fins constantly to stay in place, do fish ever sleep? Less like sleep and more like suspended animation, most fish species do spend some time resting. And like us, if they don’t put in enough downtime, they try to make up for it later. Sleep has a simple definition […]

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Why Gnats Swarm

Gerry D. asks: Why do nats swarm in a ball in the air? A common sight in the spring and summer, the seemingly unprofitable and pointless habit of gnats to hover in a cloud is, in fact, the single most productive thing they’ll ever do with their short lives. Although there are a wide variety of non-biting, but eminently annoying, […]

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What Do Cockroaches Eat and Where Do They Live When There are No Houses Around?

Soshi K. asks: What do cockroaches eat and where do they live when not in our houses? Sneaky and skittering, invasive and indomitable, the disgusting peridomestic cockroach is a formidable enemy for anyone unlucky enough to live among them. Interestingly, however, they are surprisingly delicate, and at least one species is utterly dependent on humans for its survival. Of the […]

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The Fish That Talk with Farts

In addition to being an occasional biological necessity, human flatulence has served a variety of uses, including as a way to clear a room, entertain friends, torture a sibling, and tease a child (pull my finger). But while some humans have elevated farting to an art form (see: The Most Famous Farter in History), perhaps no entire species has elevated […]

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How Do Clams Reproduce?

F. Whisten asks: Is it true that all clams are male? If so, how do they reproduce? Encased in a hard shell, brainless and possessing only a single limb (a retractable foot that looks like a tongue), clams seem like a species for which reproduction would be difficult. And yet, each year, millions of clams are born – thanks in […]

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How is Silk Made?

Mark D. asks: How do they make real silk from worms? One of the softest fabrics on the planet, shiny, breathable and comfortable, silk has been a highly prized cloth since it was first harvested thousands of years ago. And despite advances in production methods and new possibilities for cultivation, still today the only reasonable way to glean the thread in […]

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