チベットのある部族の間では、天葬(鳥葬)が一般に行われている葬儀らしい。理由として、高度が高い為に火を起こす為の薪が確保し難い、土葬をしても気温が低い為に微生物の分解が進まない事、等あるらしいが、本来の意味としてはハゲワシ等に遺体を食べさせる事によって死後の体がより天に近くなる事、生きる為に沢山の生命を殺して来た人間の自然に対する布施、等。Googleすればもっと深く調べられると思いますが、目を伏せたくなる様な写真ばかりなので、そこは自己責任で。自分個人の意見としては、、、、正直に言えば、馴染みが無いだけにかなり残酷に見えます。始めて知った時には驚きましたが、宗教上、環境上を考えれば知っておいて損は無いかと思ったのでここに載せます。
Sky burial or ritual dissection is (was once) a common funerary practice in Tibet wherein a human corpse is cut in specific locations and placed on a mountaintop, exposing it to the elements or the mahabhuta (the 4 great elements, Earth, Water, Fire, Air) and animals – especially to birds of prey. Most of Tibet is above the tree line, and the scarcity of timber makes cremation economically unfeasible. Additionally, subsurface interment is difficult since the active layer is not more than a few centimeters deep, with solid rock or permafrost beneath them.
Sky burial is considered an act of generosity on the part of the deceased, since the deceased and his/her surviving relatives are providing food to sustain living beings. Generosity and compassion for all beings are important virtues in Buddhism. Although some observers have suggested that Sky burial is also meant to unite the deceased person with the sky or sacred realm, this does not seem consistent with most of the knowledgeable commentary and eyewitness reports, which indicate that Tibetans believe that at this point life has completely left the body and the body contains nothing more than simple flesh.
*Some texts were paraphrased from Wikipedia.*
I personally think it just looks cruel because I'm not familiar with it. Although I thought it's important to know about it in order to understand the differences that come between religions.