ADVERTISEMENT
  About the SA Blog Network

Posts Tagged "eggs"

Anthropology in Practice

Beyond Ishtar: The Tradition of Eggs at Easter

Eggs occupy a special status during Easter observances. They’re symbols of rebirth and renewal—life bursts forth from this otherwise plain, inanimate object that gives no hint as to what it contains. In this regard it is a handy symbol for the resurrection of Jesus Christ, but it is is a symbol that has held this [...]

Keep reading »
Anthropology in Practice

Editor’s Selections: Eggs, Flimsy houses, Summer spending, and Fingerprints

Featured this week in my ResearchBlogging.org column: At Powered by Osteons, Kristina Killgrove has a fantastic seasonal post up on the symbolism of eggs and their role in burials. At Gambler’s House, teofilo clears up usage of the word “flimsy” in the context of Mississippian houses by highlighting an interesting bias that the word contributes. [...]

Keep reading »
Extinction Countdown

Century-Old Egg Answers Mystery about Critically Endangered Bird

jerdon's courer egg

Few people have ever seen a Jerdon’s courser (Rhinoptilus bitorquatus), a critically endangered nocturnal bird that lives in a tiny scrub forest in southeastern India. And until recently it was thought that no one had ever seen a Jerdon’s courser nest or egg. But it turns out that a single egg from one of these [...]

Keep reading »
Extinction Countdown

Egg Swap for Operatic New Zealand Birds a Success, but Invasive Predators Create Discord

kokako david cook sq

New Zealand used to be home to two subspecies of the rare birds known as kōkako (Callaeas cinereus). Today only one subspecies remains. The South Island kōkako was last seen in 1967 and was finally declared extinct six years ago. Conservationists are determined to save the remaining subspecies, which can still be found in the [...]

Keep reading »
Not bad science

Birds arrange eggs in their nests to better detect imposters

Most birds build their own nests and incubate their own eggs. However, some birds like the cuckoo have managed to get around this inconvenience by simply laying their eggs in the nests of other species and letting someone else do the hard work of keeping the eggs warm and protected until the chick hatches. The [...]

Keep reading »
Observations

Quails Demonstrate Mastery of Camouflage to Protect Their Colorful Eggs

quail egg camouflage

A quail egg is like a protein-filled, free lunch, waiting on the ground to be spotted—and devoured—by a predator. But the Japanese quail (Coturnix japonica) seems to have mastered an impressive level of camouflage-manipulating behavior to keep her eggs off the menu. Female Japanese quails tend to lay distinctive eggs that are specific to each [...]

Keep reading »
Observations

Baby Mice Born from Eggs Made from Stem Cells

mouse egg stem cell babies

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 [...]

Keep reading »
Observations

50 Shades of Sea Slug Sex: It’s Stranger Than You Think

sea slug sex traumatic mating female

Two-part barbed penises, a physical struggle and 20 minutes of penetration. That’s how some sea slugs do it. But the real shocker is that, for one species at least, those in the female role seem to engage in these bizarre, violent sexual encounters more often than might be biologically necessary. Nothing about sea-slug sex sounds [...]

Keep reading »
Observations

Dogma Overturned: Women Can Produce New Eggs [Video]

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 [...]

Keep reading »
Octopus Chronicles

Baby Octopuses: Pickier Eaters Than Baby Humans

baby octopus food

Baby octopuses are notoriously difficult to keep alive in captivity—as in, almost impossible. Like their adult parents, they’re sensitive to water pH and temperature and all of that jazz. But unlike grown octopuses in captivity, the babies almost always die of starvation. Often just within a few days of hatching. We humans have tried feeding [...]

Keep reading »
Octopus Chronicles

Octopus Babies Hatch by the Thousands, Captured on Video

octopus baby hatch

Octopuses live short, lonely lives. Even the big ones only see a few years. And that usually means only one shot at creating the next generation—and they don’t have time for parenting. So they up the odds of passing along their genetic legacy by making lots of babies, as in thousands and thousands of babies. [...]

Keep reading »
Octopus Chronicles

Unusual Offshore Octopods: Deep-Sea Octopus Hatches Fully Formed, Walks Away [Video]

octopus walk egg hatchling

Most octopuses take the million-to-one-odds strategy when it comes to reproduction. They lay thousands—if not tens or hundreds of thousands—of tiny eggs. Out of these hatch bitty proto-octopuses, which drift around with other plankton and paralarvae, at the mercy of currents and anything hungrier and larger than they are (which can even include their siblings). [...]

Keep reading »
Octopus Chronicles

Unusual Offshore Octopods: Argonaut Octopus Builds a “Shell” for Swimming [Video]

Argonaut octopus

The vast majority of octopus species live along the sea floor—whether that is in the sandy shallows off a tropical coast or in the dark depths around hydrothermal vents. But a handful of octopuses spend their lives swimming in the open seas, many using internal air-filled swim bladders to stay buoyant. But females of one [...]

Keep reading »

More from Scientific American

Scientific American Back To School

Back to School Sale!

12 Digital Issues + 4 Years of Archive Access just $19.99

Order Now >

X

Email this Article



This function is currently unavailable

X