Vulturecam Flies Amongst the Vultures (Narrated by David Tennant) - Earthflight - BBC One (via BBC)
ハゲワシ型の模型飛行機にカメラを搭載しハゲワシとともに飛ばして撮影されるBBCのnatural history film
「おひとりさま」専用の携帯電話サービスである。
アラフォー独身女性の携帯が突然「キュウキュウキュウ」と鳴る。
びっくりしてチェックすると厚生労働省からのエリアメールが。
内容はこうである。
「閉経まであと８７９日に迫りました」
アラフォー独身女性の携帯が突然「キュウキュウキュウ」と鳴る。
びっくりしてチェックすると厚生労働省からのエリアメールが。
内容はこうである。
「閉経まであと８７９日に迫りました」
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| — |
くりかえすがこの作者はこんなおもしろい話をblogなんかに書いてないでマンガ描け |
cwnl:
With their keen vision and deadly-accurate pounce, jumping spiders are the cats of the invertebrate world. For decades, scientists have puzzled over how the spiders’ miniature nervous systems manage such sophisticated perception and hunting behavior. A new study of Adanson’s jumping spider (Hasarius adansoni) fills in one key ingredient: an unusual form of depth perception.
Like all jumping spiders, the Adanson’s spider has eight eyes. The two big ones, front and center on the spider’s “face,” have the sharpest vision. They include a lens that projects an image onto the retina—the light-sensitive tissue at the back of the eye. That much is common in animal vision, but the jumping spider’s retina takes things a step further: It consists of not one but four distinct layers of light-sensitive cells. Biologists weren’t sure what all those layers were for, and research in the 1980s made them even more enigmatic. Studies showed that whenever an object is focused on the base layer, it is out of focus on the next layer up—which would seem to make the spider’s vision blurrier rather than sharper.
That led to a “long-standing mystery,” says Duane Harland, a biologist who studies spider vision at AgResearch in Lincoln, New Zealand, and who was not involved in the new study. “What’s the point of having a retina that’s out of focus?” The answer, it turns out, is that having two versions of the same scene—one crisp and one fuzzy—helps spiders gauge the distance to objects like fruit flies and other prey.
ScienceShot: Ugly Noses Help Bats Navigate - ScienceNOW
as the bat emits sound through its nose, the folds reduce the size of the main lobes, thereby tightening the focus of the sound beam
コウモリの変な形の鼻は超音波のビームを整形し指向性を改善して雑音を低減する事をモデルシミュレーションでつきとめた
Listening for a Safe Neighborhood - ScienceNOW
Scops olws listen little owl alarm calls to size the risk of nesting site.
ふくろうは他のふくろうの警戒声を参考にして巣の場所を決める
ScienceShot: Brightness Is in the Eye of the Beholder - ScienceNOW
錯観であっても明るく見えるものを見たときに瞳孔は収縮する
しかし徐々に物理的な光の量に合った開口に移行する
