hal2k1
hal2k1 t1_jdv1ck0 wrote
Reply to comment by senorali in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
Well they are not native but there are over a million Australian feral camels. These animals are much bigger than kangaroos. Yet there are roughly 50 million kangaroos in Australia. In Australia kangaroos fare better than camels. Effective body plan?
hal2k1 t1_jdv0a0f wrote
Reply to comment by [deleted] in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
These animals are wallaroos. The one on the right is standing almost vertical.
hal2k1 t1_jduqtzl wrote
Reply to If there was a hole in the ISS, would everyone get sucked out like in Sci-Fi movies? by hobbitlover
Vacuums don't suck. Rather pressure presses. The air pressure inside the ISS pushes the air in the ISS out through a hole in the hull.
So if you are near the hole in the hull the air in the middle of the ISS that is pressing to get out the hole in the hull pushes on you as well. If however you were near the wall furthest away from the hole in the hull there wouldn't be much air behind you (with respect to the hole) pushing you towards the hole. So you would likely die from lack of air eventually rather than via being pushed out the hole.
hal2k1 t1_jdum41b wrote
Reply to comment by michaelrohansmith in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
In terms of covering ground kangaroos have some impressive statistics. Interestingly kangaroos don't run, they jump. Kangaroos are recognized in the jumping category as the best jumpers in the world. They can spend more than 30 minutes jumping as they have excellent resistance and know how to manage their energy well.
hal2k1 t1_jdugphe wrote
Reply to comment by [deleted] in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
I forgot about the quokkas. Quokkas can stand erect.
hal2k1 t1_jdufmsp wrote
Reply to comment by michaelrohansmith in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
There are only a hundred or so species of kangaroos, wallaroos, wallabies and kangaroo rats but, if you count birds capable of flying as well as walking, there are many thousands of species of bipedal birds.
hal2k1 t1_jdudaqk wrote
Reply to comment by envybelmont in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
There are somewhere between 49 and 53 million kangaroos in Australia. Far more kangaroos than people.
Excluding humans I don't know how many great apes there are.
hal2k1 t1_jdubtu1 wrote
Reply to comment by CyclicDombo in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
Kangaroos and wallabies stand erect if they are watching out for threats or just trying to see what is going on. They can see further when they stand erect.
When they are grazing their spine is horizontal but their front limbs are not used for mobility or stability. Their tail does the stability function.
hal2k1 t1_jdxksw9 wrote
Reply to comment by AvcalmQ in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
Australia is a fairly big place. It's either the world's largest island or the smallest continent depending on how you define it.