![Warm up, cool down](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414623/title.640_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414611/fish2.240_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414616/vlinder.240_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414619/NGX0919_EE_2_3c.320_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414613/fish4.240_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414621/Group_4.640_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414615/fly.128_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414620/NGX0919_EE_2_3f.240_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414612/fish3.128_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414618/NGX0919_EE_2_3b.400_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414614/fish5.240_0_1.png)
![](/nationalgeographic/pathfinder_september_2019/warm_up_cool_down/414610/fish1.240_0_1.png)
Checkoutthiscolorfulcollectionofcritters.Whatdotheseanimalshaveincommon?Theyareall ectotherms.
What’s that?
ByGlen Phelan
Wildlife
Life Science
Asyouread,thinkabout howanimalshavedifferentinternalstructuresthathelpthem survive.
Checkoutthiscolorfulcollectionofcritters.Whatdotheseanimalshaveincommon?Theyareall ectotherms.
What’s that?
ByGlen Phelan
Asyouread,thinkabout howanimalshavedifferentinternalstructuresthathelpthem survive.