mammals
laelaps | May 8, 2009
The skeleton of Inostrancevia, a Permian synapsid from modern-day Russia. From the American Museum Journal.
The science of paleontology has long been concerned with searching out the origins of modern groups of animals, but at the turn of the 20th century there were frustratingly few transitional fossils. That evolution had occurred was generally agreed upon, but where the transitional forms might be found, what they would look like, and what mechanisms drove their evolution remained disputed. Among the murkiest of these subjects was the origin of mammals.
In an 1898 letter published in…
laelaps | May 7, 2009Do you like Permian synapsids? If you do then you definitely should check out this month's edition of the ART Evolved carnival. I particularly like Nima Sassani's Greg-Paul-like illustration of a pack of Inostrancevia.
laelaps | May 7, 2009As reported in the New York Times Carole C. Noon, the founder of Save the Chimps, passed away this week. She was 59 and suffered from pancreatic cancer.
I first learned of Carole and Save the Chimps when I saw the documentary Chimpanzees: An Unnatural History. Since 1997 Noon and her organization have worked to acquire and care for chimpanzees used in biomedical experiments, the entrainment industry, or kept as pets.
One of the biggest wins for Save the Chimps was when the organization was able to rescue 266 chimpanzees that were being improperly kept (and even abused) at the Coulston…
laelaps | May 7, 2009
Mother gorilla (Gorilla gorilla) Mandara holding her child Kibibi. Photographed at the National Zoo.
laelaps | May 5, 2009
Tai Shan the giant panda (Ailuropoda melanoleuca). Photographed at the National Zoo.
grrlscientist | May 5, 2009tags: evolutionary biology, AMNH, American Museum of Natural History, New York City, mammals, biodiversity
Because I write for ScienceBlogs, I have been invited to a special sneak preview of the "Extreme Mammals" exhibit hosted by the American Museum of Natural History, where I was a postdoctoral fellow for two years. This exhibit features the biggest, smallest, most amazing and generally the weirdest mammals to ever swim, fly or walk the face of this earth. "Extreme Mammals" opens to the public on Saturday, 16 May, but my goal is to take a lot of photographs to share with you here on the…
laelaps | May 5, 2009Since Bora mentioned it...
The hungry hunters go after some jumbo-sized Syndyoceras.
laelaps | May 4, 2009
A swarm of hunters tries to take down a Uintatherium. Nevermind that it lived over 35 million years before the first hominins appeared...
laelaps | May 4, 2009By the 1920's the evolution of elephants (proboscideans) seemed all but resolved. Paleontologists had long been familiar with mammoths and mastodons, the great shaggy beasts that had so recently gone extinct, but in 1901 fitting candidates for the progenitors of all later elephants became known. Named Moeritherium and Palaeomastodon by British paleontologist C.W. Andrews, the two proboscideans from Eocene rock of the Fayum region of Egypt were the forms that could connect elephants to the rest of the mammal family tree.
Finally elephant evolution could be presented in a straight line. It had…
edyong | May 4, 2009Most of us start to tire after about half a day without any sleep. Staying awake for five in a row would be extremely difficult and even if you could manage it, you'd be a physical and mental wreck by the end. But not all animals suffer from the same problem. A dolphin can stay awake and alert for at least 5 days straight, chaining together all-nighters without any noticeable health problems or loss of mental agility.
The two halves of a dolphin's brain can sleep in shifts, "shutting down" one at a time so that the animal is always half-awake. They can truly sleep with one eye open, an…
edyong | May 3, 2009
Being confronted with a pack of wolves is bad enough, but if you happened to be in Alaska some 12,000 years ago, things would be much, much worse. Back then, the icy forests were patrolled by a sort of super-wolf. Larger and stronger than the modern gray wolf, this beast had bigger teeth and more powerful jaws, built to kill very large prey.
This uber-wolf was discovered by Jennifer Leonard and colleagues from the University of California, Los Angeles. The group were studying the remains of ancient gray wolves, frozen in permafrost in eastern Beringia, a region that includes Alaska and…
edyong | May 2, 2009
Impressionists are a mainstay of British comedy, with the likes of Rory Bremner and Alistair MacGowan uncannily mimicking the voices of celebrities and politicians. Now, biologists have found that tiger moths impersonate each other too, and they do so to avoid the jaws of bats.
Some creatures like starlings and lyrebirds are accomplished impersonators but until now, we only had anecdotal evidence that animals mimic each others' sounds for defence. Some harmless droneflies may sound like stinging honeybees, while burrowing owls deter predators from their burrows by mimicking the…
laelaps | April 30, 2009
The skull of Dorudon, photographed at the National Museum of Natural History.
There has been much ado about the new BioLogos website during the past week (see here and here), and most of it has focused on the site's aim of reconciling science and Christian theology. What irked me more, however, was the lazy way in which the creators of the site approached evolutionary science. The section on the fossil record provides a perfect example.
The evolution of whales has been a hot topic lately, and for good reason. After over a century of frustrating uncertainly we now have a very detailed (…
laelaps | April 30, 2009
A domesticated horse (Equus ferus caballus), photographed in suburban New Jersey.
gregladen | April 29, 2009As long as we are on the subject (this week) of field guides, I thought I'd go ahead and suggest what guides you might take if you happen to be planning a trip to Central, East or southern Africa1
But since we are doing Africa, we need to do mammals as well as birds. But let's start with the birds.
The standard bird guide for southern Africa is Newman's Birds of Southern Africa and there was a time years ago that this was actually the best book for East and Central Africa as well, owing to a lack of other available field guides. Today, East Africa is well covered by the sometimes hard to…
laelaps | April 29, 2009
A view from inside the cave in which the "Yemisch" remains were found. [source]
It was not so long ago that tales of an awful creature that stalked the pampas of Patagonia were commonly told. It was difficult, if not impossible, to find anyone who had actually seen it, but many knew of its fearsome power. It was called the Yemisch, and it was a predator that preferred to disembowel its prey. One moment a person or some cattle would be crossing the stream and the next the water would be a blood-red boil. All that was usually left of the victims were greasy entrails floating their way…
laelaps | April 27, 2009
An illustration of the mammoth that accompanied Tukeman's story. From the McClure's Magazine.
In October of 1899 McClure's Magazine ran a rather curious article by Henry Tukeman. Called "The Killing of the Mammoth" it began with a letter penned by a recently-deceased chap named Horace Conradi which released Tukeman from his promise to keep the slaughter of what may have been the last living mammoth a secret. Tukeman could finally tell his story.
Tukeman's story began in the untamed wilds of Alaska in 1890. There was little in the way of creature comforts, but Tukeman decided to stay the…