Bert's unibrow, orange Oscar and more fun facts for 'Sesame Street' 45th anniversary

IMAGE: Oscar the Grouch
Oscar the GrouchSesame Street via Twitter

Those of us who grew up with "Sesame Street" learned a lot from the groundbreaking PBS show, including how to count to 20 in Spanish, and all about the difference between "near" and "far." 

But did you know that Oscar the Grouch was once orange? That between Bert and Ernie, they have exactly one eyebrow? "Sesame Street" celebrated its 45h anniversary on Monday by tweeting 45 facts about the beloved childhood classic.

Here are our favorites.

In+total,+Bert+and+Ernie+have+one+eyebrow.+#45SesameFacts+pic.twitter.com/XDTk91ssrv

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

On+the+first+season+of+Sesame+Street,+Oscar+the+Grouch+was+orange.+#45SesameFacts+pic.twitter.com/YU050LX3IH

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Count+von+Count+has+a+pet+octopus+named+Octavia.+#45SesameFacts

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Snuffleupagus+has+a+first+name.+It’s+Aloysius.+#45SesameFacts+pic.twitter.com/4VpoUVMipv

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

In+1990,+a+clay+stop-motion+short+starring+a+character+named+Arnold+debuted+on+the+show.+It+would+become+“Hey,+Arnold!”+#45SesameFacts

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

In+Martian-speak,+“Yip+yip+yip”+still+means+“yip+yip+yp.”+#45SesameFacts+pic.twitter.com/FYB0Gr73kg

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Mister+Hooper+died+31+years+ago.+We+still+miss+him.+#45SesameFacts+pic.twitter.com/kLgSHL2USE

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Rosita+originally+had+wings.+She+was+designed+to+be+a+fruit+bat.+#45SesameFacts

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Cookie+Monster+has+five+fingers+on+each+hand.+All+the+other+monsters+four.+#45SesameFacts+pic.twitter.com/ZB9dcDb4ic

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Big+Bird+is+8’2”+tall.+Or+about+two+and+a+half+meters.+#45SesameFacts+pic.twitter.com/CB4MrXi23V

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Oscar+has+a+cell+phone,+but+it+weighs+seven+pounds+or+so.+It’s+an+old+one+Jim+Henson+threw+away.+#45SesameFacts

—+Sesame+Street+(@sesamestreet)+November+10,+2014+

Telly+is+named+after+his+original+obsession.+No,+not+triangles.+Television.+#45SesameFacts

—+Sesame+Street+(@sesamestreet)+November+10,+2014+