This baby nautilus emerged this week from an egg laid last November at San Diego's Birch Aquarium. For this tiny cephalopod, the process of being born took not hours, or even days, but weeks. The ZooBorns site has a series of photos that show how the nautilus slooooooowly emerged from the egg.
Biologists don't know exactly why this process takes the nautilus so long.
For one thing, they're difficult to breed in captivity. (It's not panda hard, but not simple, either. This was the first egg to actually hatch at the Birch Aquarium, out of 40 laid over the last 3-4 years.) The first captive nautilus hatchlings weren't recorded until 1990. We've still got a lot to learn about them.
One thing we do know, though, is that baby nautiluses don't seem to come with any special apparatus for breaking themselves out of the egg. In contrast, most birds and reptiles (as well as some frogs, spiders, and egg-laying mammals) have what's called an "egg tooth" — sort of nature's bottle opener for egg-bound embryos. Lacking that, nautilus hatchlings are basically forced to wiggle their way out of the egg along the line where a seam of capsule splits.
That's exhausting work, especially for a creature only 3cm long.
Caltech theoretical physicist Sean Carroll, author of Something Deeply Hidden: Quantum Worlds and the Emergence of Spacetime, explains the concept of a “dimensions” at five different levels of complexity. Dr. Carroll sure has a big brane.
In 1936, the Tasmanian tiger (Thylacinus cynocephalus) was declared to be extinct. Yet in the last three years, there have been eight reported sightings according to Tasmania’s Department of Primary Industries, Parks, Water and Environment. I hope it’s true. From CNN: While stories abound that some continue to live in the remote wilds of Tasmania, […]
Who doesn’t love a free meal? From Nautilus Live: During the final dive of this year’s Nautilus expedition season, our team discovered a whale fall while exploring Davidson Seamount off central California’s coast with researchers from Monterey Bay National Marine Sanctuary. The skeletal remains of the whale lying on its back are estimated to be […]
Do you own a Mac? Unless you’re using it for a paperweight, you almost can’t afford not to get the Magnificent Mac Bundle. It’s a roundup of some truly essential security and file management apps, bundled up with great photo and video enhancers. The best part is that all nine apps are potentially available for […]
As much as vaping has taken over the market during the last decade, there’s still a lot of questions about the technology, as well as health concerns that we’re just now finding out about. One thing you can say about smoking: You know exactly what you’re getting, especially when it comes to pipes that you […]
We can’t all go through life with just a pair of sneakers and flip-flops. Sometimes, you have to invest in a pair of high-quality dress shoes. However, you’ve probably discovered that high-end footwear almost always comes with eye-popping price tags. You’ve got to compromise on second-hand or just suck it up and take out a […]