Is Psychometric g a Myth? - "As an online discussion about IQ or general intelligence grows longer, the probability of someone linking to statistician Cosma Shalizi's essay
g, a Statistical Myth approaches 1. Usually the link is accompanied by an assertion to the effect that Shalizi offers a definitive refutation of the concept of general mental ability, or psychometric
g."
[more inside]
posted by kliuless
on Apr 11, 2013 -
113 comments
Five years ago this week, the BBC started broadcasting one of the most extraordinary documentaries ever to grace television:
Planet Earth. The culmination of
five years of field work, it employed
the most cutting-edge of techniques in order to capture life in all its forms, from
sweeping spaceborne vistas to shockingly intimate close-ups -- including
many sights rarely glimpsed by human eyes.
Visually spectacular, it showcased footage shot in
204 locations in 62 countries, thoroughly documenting every biome from the snowy peaks of the Himalayas to
the lifegiving waters of the Okavango Delta, a rich narrative tapestry backed by
a stirring orchestral score from the BBC Concert Orchestra. Unfortunately, the series underwent
some editorial changes for rebroadcast overseas. But now fans outside the UK can rejoice -- all eleven chapters of this epic story are available on YouTube in their original form: uncut, in glorious 1080p HD, and with the original narration by renowned naturalist
Sir David Attenborough. Click inside for the full listing (and kiss the rest of your week goodbye).
[more inside]
posted by Rhaomi
on Mar 7, 2011 -
69 comments
Imagine nature's most elegant ideas organized by design and engineering function, so you can enter "filter salt from water" and see how mangroves, penguins, and shorebirds desalinate without fossil fuels. That's the idea behind
AskNature, the online inspiration source for the
biomimicry community. The
featured pages are a good starting point. Cross-pollinating biology with design.
[more inside]
posted by netbros
on Jun 5, 2009 -
13 comments
Hunting the Hidden Dimension. You may be familiar with fractals, but in this PBS Nova episode, divided online into 5 parts, fractals go beyond the impossible zoom of the
Mandelbrot set. Scientists are using fractals to describe complex natural occurrences, like
lava,
capillaries, and
rain forests. In part 5, scientists measure one tree in the rain forests, and the distribution of small and large branches mirror the distribution of small and large trees. Fractals, it seems,
are nature.
posted by plexi
on Nov 2, 2008 -
43 comments
"With most animals, males duke it out and the winner gets the girls," says Holekamp. "But with hyenas, females have 100 percent say." They decide when and under what conditions they will tolerate deferential sperm donors. At age 2 or 3 a male leaves his natal clan and wanders off to beg acceptance into another clan. After vicious rejections, he eventually succeeds and reaps his reward: brutal harassment as the clan's nadir, one of the last in line for food and sex. This probation, which biologists call "endurance rivalry," is a test, Holekamp explains: "The guy who can stick it out the longest wins." The trial lasts about two years, after which some females may grant him access. "You do not want to be a male hyena," Holekamp says.
-From an article in Smithsonian Magazine,
Who's Laughing Now? Professor Holekamp's
hyena site. Also,
hyena pictures and
The Hyena Pages, a fine site about this fascinating animal.
posted by Kattullus
on May 7, 2008 -
32 comments
While the dream of immortality might be as old as mankind, the jellyfish Turritopsis nutricula
(image) seems to be
living it:
The hydrozoan Turritopsis nutricula has evolved a remarkable variation on this theme, and in so doing appears to have achieved immortality. The solitary medusa of this species can revert to its polyp stage after becoming sexually mature (Bavestrello et al., 1992; Piraino et al., 1996). In the laboratory, 100% of these medusae regularly undergo this change. Thus, it is possible that organismic death does not occur in this species!
An in-depth research paper.
posted by Foci for Analysis
on Jan 30, 2008 -
48 comments
Exotic Entomology. 'Provided for your delight are a small number of the world's butterflies and moths, taken from Dru Drury's three-volume monograph entitled Illustrations of Exotic Entomology.'
Related :-
Schreber's Fabulous Beasts. 'In 1774 Johann Christian Dan Schreber authored a multivolume set of books entitled Die Saugthiere in Abbildungen nach der Natur mit Beschreibungen. Focusing on mammals of the world, these books were lavishly illustrated with 755 hand-colored plates ... '
posted by plep
on Jul 5, 2003 -
8 comments
