Asteroid: Antarctica, Mexico ...

A fall na wani asteroid to Earth - a cataclysm na duniya rabbai. Yana da yaushe kai ga canje-canje a cikin sauyin yanayi na duniya tamu, saboda wanda ya mutu daga babbar dama jinsunan rayayyun kwayoyin halitta. A cewar daya daga cikin mafi sahihanci a idanun jarrabawa, wato asteroid sa da Permian-Triassic nau'i nau'i taron game da ɗari biyu da hamsin shekaru miliyan da suka wuce. Permian nau'i nau'i, ko da yake da shi ba sosai da aka sani ga jama'a, yafi ban tausayi fiye da sanannen dinosaur nau'i nau'i shekaru miliyan saba'in da suka wuce. A cikin farko idan ya mutu har zuwa 96% na nau'in marine kwayoyin (kamar shuke-shuke da dabbobi). A ƙasar da halin da ake ciki ya ba da mafi alhẽri: kashe saba'in bisa dari na nazarin sasannin vertebrate jinsunan da tamanin da uku bisa dari na kwari jinsunan. Wannan taro nau'i nau'i na kwari a cikin yanayi ya ba, kamar yadda wadannan arthropod ne musamman sauki saje da yanayi.

Na biyu bala'i da yawa a kasa yankunan, amma daga nan, kuma, akwai wani canji na nazarin halittu rinjaye, abu zuwa fitowan da kuma ci gaban dabbobi masu shayarwa. Jarrabawa mai lamba daya - wannan asteroid. A cikin farko idan, da masu bincike nuna wa Wilkes Land bakin dutse a Antarctica, wanda, a cikin ra'ayi, aka kafa ta fall na asteroid, na biyu - a kan Chicxulub bakin dutse a Mexico.

Wilkes Land bakin dutse yana da wani diamita na ɗari biyar kilomita. An gaba daya boye a karkashin kankara harsashi na Antarctica, don haka karatu shi ne ba tukuna zai yiwu. Amma a shekarar 2009 an gudanar da radar karatu, da kuma gano cewa, shi yana da siffar halayyar tasiri craters kafa a kan site na asteroid ko a manyan meteorite. Bakin dutse Chiksulub yawa karami, kuma yana da diamita na daya ɗari da tamanin kilomita. Wannan shi ne girman wani auku asteroid dogara sikelin nau'i nau'i na nazarin sasannin kwayoyin.

Masana ilmin babu yarjejeniya game da abin da irin tasiri taron - fall na asteroid, da kuma wasu - faduwar wani meteorite, tauraro mai wutsiya ko wani abu dabam. Masu bincike a cikin sama ba zai iya yanke shawara abin da basamaniyai kamata a classified a matsayin asteroids, da kuma abin da - to meteorites kuma ko da taurari. Bakwai da suka wuce, da pundits sun yanke shawarar ware wani sabon aji na wani sarari suKe jikinsu. Yana rubuce da dama manyan asteroids da demoted daga mukamin wannan duniyar tamu Pluto. A ajin yanke shawarar da za a kira "Dwarf taurari." Innovation ba karbuwa a duniya, kamar yadda da yawa Masana ilmin takarar ya dace da sabon rarrabuwa.

Abin da ya faru a tsakiyar Fabrairu taron girgiza Rasha, da kuma musamman - Ural. Meteorite, wanda ya fadi a kusa da Chelyabinsk, kwararru daga NASA dauke da most na lura bil'adama bayan da Tunguska. A cikin memory na mutane shi ne mai meteorite da ya sa mafi lalacewa da kuma raunin da ya faru. Ko da yake ya barke cikin guda kafin kai da ƙasa, ya gudanar ya yi yawa da matsaloli, ko lalata shagon na daya daga cikin Chelyabinsk shuka. A latsa ya ruwaito cewa meteorite - riga na asteroid cewa zai wuce kusa da duniya, kuma shi ne mai yiwuwa abin da zai fada a cikin filin na janye daga wannan duniya tamu.

Sha'awa, da meteorites a cikin Urals zama wani abu kusan saba, nasu, 'yan qasar. A gwada da kananan yankin Chelyabinsk yankin (fiye da tasa'in dubu murabba'in kilomita) a karshe saba'in da biyar na uku zama cibiyar haduwa ga baƙi daga m sarari. A 1941-m da kuma 1949-m located in arewa yanki na birnin Katav-Ivanovsk da kuma kauye Kunashak ma fada meteorites, ko da yawa karami a size. All uku za a iya haɗa da hadarin site na wani kusan mike layin tsawon ba fiye da ɗari biyu da hamsin kilomita. Irin wannan meteorites taro a wata iyaka yanki a cikin irin wannan gajeren lokaci ba a samu ko ina cikin duniya. To, kawai wasu sufi!

A hatsari a cikin Urals bayyana cewa mu ne m ga bombardment daga sarari. A Rasha, ya fara da ci gaban da goma-shekara shirin domin kariya daga cosmic barazana.