Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Bhuku raStephen Jay Gould rinonzi Wonderful Life, rakabudiswa muna 1989, rakaita kuti vanhu vazive nezvezvitunha zveBurgess Shale. Gould anotaura kuti kusiyana-siyana kunoshamisa kwezvicherwa kunoratidza kuti marudzi oupenyu panguva iyoyo akanga akasiyana zvikuru muchimiro chomuviri kupfuura ayo akapona nhasi, uye kuti marudzi akawanda akasiyana akanga ari miedzo yokushanduka-shanduka yakatsakatika. Tsananguro yaGould yezvakasiyana-siyana zvemhuka dzeCambrian yaitsamira zvikuru pakududzirwazve kwaSimon Conway Morris kwezvakanyorwa naCharles Walcott. Zvisinei, Conway Morris haana kubvumirana zvachose nemhedziso dzaGould, achitaura kuti mhuka dzose dzeCambrian dzinogona kuiswa muzvikwata zvemazuva ano. Burgess Shale yakakwezva kufarira kwevanoongorora mamiriro ekunze ekare vanoda kudzidza nekufanotaura shanduko yenguva refu yemamiriro ekunze epasi. Maererano naPeter Ward naDonald Brownlee mubhuku ra2003 rinonzi The Life and Death of Planet Earth, vanodzidza nezvemamiriro okunze vanodzidza zvinyorwa zvezvisaririra zviri muBurgess Shale kuti vanzwisise mamiriro ekunze ekuputika kweCambrian, uye vanozvishandisa kufanotaura kuti mamiriro ekunze epasi angaratidzika sei makore mazana mashanu emamiriyoni mune ramangwana apo kupisa uye kuwedzera kweZuva pamwe chete nekuderera kweCO2 uye okisijeni mazinga pakupedzisira kupisa Pasi kusvika kumatembiricha asina kumboonekwa kubva kuArchean Eon makore 3 bhiriyoni apfuura, zvisati zvaitika zvirimwa nemhuka, uye nekudaro vanonzwisisa kuti zvipenyu zvekupedzisira zvichafa sei uye riini. Onawo Ramangwana reNyika.  Mubvunzo: Nhau inonzi Upenyu Hwakanaka yaGould yaitaura nezvei?
Zvicherwa zveBurgess Shale