' s ▁landing ▁in ▁Green land , ▁Koch ▁made ▁a ▁s ledge ▁journey ▁along ▁the ▁north ▁coast ▁of ▁Green land , ▁round ▁Pe ary ▁Land ▁and ▁back ▁across ▁the ▁In land ▁Ice . ▁On ▁this ▁journey ▁Koch ▁discovered ▁a ▁de pression ▁which ▁in ▁his ▁opinion ▁was ▁the ▁one ▁that ▁Robert ▁Pe ary ▁in ▁ 1 8 9 2 ▁had ▁mistaken ▁for ▁a ▁channel ▁— the ▁so - called ▁" Pe ary ▁Channel ". ▁Koch ' s ▁observations ▁of ▁the ▁interior ▁of ▁Independ ence ▁F j ord ▁led ▁to ▁considerable ▁cart ographic ▁changes ▁compared ▁with ▁the ▁Peter ▁Fre uch en ▁map ▁of ▁ 1 9 1 2 . ▁ ▁In ▁ 1 9 2 2 ▁he ▁mapped ▁H ia w ath a ▁Gla cier , ▁and ▁noted ▁that ▁the ▁gla cier ▁tongue ▁extended ▁into ▁Lake ▁Al ida ▁( near ▁F oul k ▁F j ord ). ▁ ▁In ▁ 1 9 3 8 , ▁Lau ge ▁Koch ▁found ▁in ▁the ▁mountains ▁west ▁of ▁James on ▁Land , ▁near ▁Sc ores by ▁Sound , ▁the ▁ske leton ▁of ▁a ▁huge ▁ext inct ▁m amm al ▁similar ▁to ▁the ▁head ▁of ▁a ▁gig antic ▁animal ▁with ▁huge ▁teeth ▁found ▁by ▁Professor ▁Sel im ▁Hass an ▁in ▁ 1 9 3 5 ▁near ▁the ▁py ram id ▁of ▁Che ph ren . ▁The ▁ske leton ▁found ▁by ▁Koch ▁was ▁displayed ▁at ▁the ▁museum ▁in ▁C open hagen . ▁ ▁Among st ▁his ▁other ▁contributions ▁to ▁the ▁sciences , ▁in ▁the ▁mid - 1 9 3 0 s