The scientific tourist #215 — Eurypterus remipes

An interesting collection of fossils from Herkimer County, New York (but on display at the Denver Museum of Nature and Science):

Eurypterus remipes

Eurypterids, or “Sea Scorpions” are an extinct order of arthropods (related to the modern king crab) that reached their peak in the Silurian, from about 432 to 418 million years ago. They were formidable predators for their time, but like many species, went extinct in the great Permian mass extinction.

Most Eurypterids were under 10″ (25 cm) in length, but some were as long as a tall human and were the largest arthropods ever. Eurypterid fossils are found in a wide variety of places, but usually just as fragments. For well preserved full fossils, you need to go to New York state or Ontario (understandably then, Eurypterus remipes is the state fossil of New York). The fossils in this image came from the Fiddler’s Green Formation in Herkimer County, New York.

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Casual Friday — Riding the Booster, remixed

Courtesy of Skywalker Sound (the folks that did the audio for the Star Wars movies), here’s a remastered look at (listen to?) a Space Shuttle’s solid booster’s flight from lift-off to splashdown (direct link ):

It’s 8-1/2 minutes long, but very relaxing in its own way…

The plan (hope?) is for this to be released on a special edition commemorative DVD / BluRay called Ascent: Commemorating Space Shuttle. It’s made from video taken on two shuttle flights — STS-117 (June 2007) and STS-127 (July 2009).

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Carnivalia — 3/14 – 3/20

The past week’s crop of (mostly) science-related blog carnival goodness for your reading pleasure:

Carnival of Evolution #45

Carnival of Space #241

Friday Ark #376

Health Wonk Review: Wearing the Green for the St. Patrick’s Day Edition

Mathblogging.org Weekly Picks

FYI — Blogcarnival.com appears to be down for the count, so the following carnivals are incommunicado until they come up with their own, independent carnival pages (Blogcarnival.com used to host their index pages):

The Carnival of Mathematics

The Giant’s Shoulders

Math Teachers at Play

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The scientific tourist #214 — Postosuchus kirkpatricki

Another fine specimen from the Petrified Forest National Park visitor’s center in Arizona:

Postosuchus kirkpatricki

Postosuchus was another odd creature in the Triassic that looked much like a dinosaur, but wasn’t — it was an archosaur, to be specific, a rauisuchian (close relative to the crocodiles).

During the late Triassic (228 – 202 million years ago), Postosuchus was the apex predator — and one of the largest carnivorous reptiles around. Just think of him as a large (up to 4 meters / 13 feet long and weighing up to 300 kg / 660 lb), fast, occasionally bipedal, armored crocodile — and you’re most of the way there.

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Casual Friday — Skydiving from 71,581 feet (21,818 meters)

So yesterday (March 15), Felix Baumgartner dove out of a helium-balloon-borne capsule, becoming one of only three people to have jumped from above 70,000 feet (direct link):



Unfortunately the video is long on build-up and doesn’t show any footage taken during Baumgartner’s free fall. In any event, this is all part of a program called Red Bull Stratos (named after the sponsor) — they’ve got more images on their blog post about the test jump. Wired has a good article about the jump (with more pictures), too.

Bottom line: the team has some bugs to work out, but seem to be comfortably working toward their goal of a jump from 120,000 feet (36,576 meters), primarily so Felix can be the first man to break the speed of sound in free fall. They’re planning another test jump (this one from 90,000 feet / 27,432 meters) before hopefully doing the really big jump this summer.

H/T: Space.com

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Carnivalia — 3/07 – 3/13

The past week’s crop of science-related blog carnivals (some of the “usual suspects” seem to be experiencing technical difficulties, so come back later today for potential additions to this list):

Carnival of Space #240

Friday Ark #375

Grand Rounds Vol. 8 No. 25

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The scientific tourist #213 — Placerias hesternus

An odd sort of critter, now on permanent display at the Petrified Forest National Park visitor’s center in Arizona:

Placerias hesternus

Placerias hesternus was not a dinosaur — it was a dicynodont therapsid that lived in the late Triassic Period, some 221-210 million years ago. This is a bit of a mouthful, so let’s break it down:

  • Placerias — “broad body”
  • dicynodont — “two-dog tooth,” it had toothless beak-like jaws with two canine-like downward-pointing tusks
  • therapsid — a class of mammal-like reptiles

Placerias was the largest herbivore of its time, and is thought to have filled an ecological niche similar to that of the modern-day hippo.

From the placard:

Therapsids were large reptiles that possessed many mammalian characters including a “cheek” bone, enlarged canine teeth, and a specialized attachment of the skull to the spine. This massive plant-eater was up to 9 feet (2.7 m) long and might have weighed as much as two tons.

Like other dycynodonts, Placerias had a short neck, barrel-shaped body, small tail, and large tusk-like bones protruding from its upper jaw. The beak-like jaws helped to pull up and tear tough plants and roots. A large number of Placerias fossils were found in a single quarry near St. Johns, just southeast of the park.

The quarry mentioned on the placard contained the remains of forty Placerias, and was found in 1930. Based on sediment surrounding the fossils, it’s thought that they died in a flood. Placerias fossils have also been found in North Carolina and Wyoming.

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Casual Friday — how to keep the space shuttle flying

It’s easy — just use Legos! Here’s video from a balloon-lofted shuttle flight to the stratosphere (direct link):

A Romanian named Raul Oaida was responsible for pulling this off, taking the toy to 35 kilometers above central Germany. As far as anybody knows, this is the first lego space shuttle to “fly” this high (although I doubt Guiness keeps records of this particular feat).

Like to see something else flown to near-space? Raul is collecting money to fly the contributors’ choice of toy for his next flight.

H/T: Raul Oaida via Digital Photography School

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Carnivalia — 2/29 – 3/06

The past week’s crop of (mostly) science-related blog carnivals awaits your reading attentions:

Berry Go Round #49 – all the plants fit to print

Carnival of Space #239

Friday Ark #374

Grand Rounds Vol 8 No 25: Super Tuesday Edition

Health Wonk Review — the streaming edition

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The scientific tourist #212 — leaning into it

Today’s photo comes to you from the National Archaeological Museum of Florence (Museo Archeologico Centrale dell’ Etruria); it’s a fragment of limestone, originally from the palace of Sennacherib in Ninevah:

Leaning into it

Pieces like this always leave me in a bit of a quandary over where to start. The piece has a history, as does the site it came from, and the museum it’s hosted in.

So let’s start with Assyria, Ninevah, and Sennacherib. Geographically, Assyria covered the northern end of the Tigris / Euphrates valley, land that now is part of northern Iraq. Civilization there goes back thousands of years, and as you can well imagine, it’s seen its share of ups and downs. Under the Akkadian Empire in the 24th century BC, Assyria grew as a minor kingdom; after the empire fell circa 2154 BC, Assyria grew in prominence until it settled into a long period of competition with Babylonia (which covered the southern end of the Tigris / Euphrates valley). This lasted until civil war broke out circa 627 BC; the Assyrian’s neighbors took advantage of the resulting chaos, and the Assyrians spent the next 1200 years as vassals to a variety of empires (until the Islamic invasion and conquest of Mesopotamia in the 7th century AD, when Assyria finally disappeared as a political entity).

Ninevah was a small provincial town until Sennacherib was named king, and subsequently moved the Assyrian capital there in 703 BC. He rebuilt the town in grand style, erecting a home he called the “palace without rival,” and surrounding the city with a wall some 12 km long, 16 meters (53 feet) high, and 15 meters (49 feet) thick. This piece dates from Ninevah’s heyday in the 7th century BC.

Of course, this happy situation (for the Assyrians, anyway) only lasted a few generations — the city was sacked and razed in 612 BC as the Neo-Assyrian empire spiraled down. It spent the next few thousand years as humble mounds on the banks of the Tigris (across the river from modern-day Mosul, Iraq), the ruins not seeing excavation until the mid 19th century.

The National Archaeological Museum of Florence was inaugurated in 1870, and moved to its present building ten years later. Most of its artifacts are housed in one of two collections — one of Egyptian artifacts, the other of Etruscan ones. But there’s a smattering of artifacts from further afield, like the one above, and of course this one. It’s an impressive collection (well worth a visit if you ever find yourself in that corner of the globe), but is a bit lacking in explanatory material.

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