lections . ▁ ▁Category : Sing ap ore an ▁elect oral ▁divisions ▁Category : To a ▁Pay oh <0x0A> </s> ▁Ig or ▁Your iev itch ▁Bog d ano ff ▁and ▁Gr ich ka ▁Your iev itch ▁Bog d ano ff ▁( or ▁Bog dan ov ; ▁born ▁ 2 9 ▁August ▁ 1 9 4 9 ) ▁are ▁French ▁tw in ▁brothers ▁who ▁are ▁television ▁present ers , ▁produ cers ▁and ▁scientific ▁ess ay ists ▁who , ▁since ▁the ▁ 1 9 7 0 s , ▁have ▁presented ▁various ▁subjects ▁in ▁science ▁fiction , ▁popular ▁science ▁and ▁cosm ology . ▁They ▁were ▁involved ▁in ▁a ▁number ▁of ▁controvers ies , ▁most ▁not ably ▁the ▁Bog dan ov ▁affair , ▁in ▁which ▁it ▁was ▁alleg ed ▁the ▁brothers ▁wrote ▁n ons ens ical ▁advanced ▁physics ▁papers ▁that ▁were ▁non eth eless ▁published ▁in ▁re put able ▁scientific ▁journ als . ▁They ▁have ▁also ▁been ▁notable ▁because ▁of ▁their ▁personal ities , ▁family ▁orig ins ▁and ▁physical ▁appearances . ▁ ▁Early ▁years ▁ ▁Ig or ▁and ▁Gr ich ka ▁Bog d ano ff ▁are ▁identical ▁tw in ▁brothers ▁born ▁to ▁Y uri ▁Mik ha ï lov itch ▁Osten - S ack en - B og d ano ff ▁( 1 9 2 8 – 2 0 1 2 ), ▁a ▁Russian ▁painter ▁of ▁T atar ▁origin ▁and ▁descent ▁from ▁a ▁line ▁of ▁Prin ces ▁Bog d ano ff , ▁and ▁to ▁Maria ▁May a ▁Dol ores ▁Fran zy ska ▁Kol ow rat - K rak