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Apr
27
comment Human bone density and Brown Bear bone density?
The "ash fraction" value is the key here. Bear bone is 66% mineral. Typical human cortical bone is 65-70% mineral. So, no, bears don't have denser bones than humans.
Apr
27
comment Human bone density and Brown Bear bone density?
I have to think they are using density incorrectly, and since they provide no reference, we really can't check. There is no way that bone density, in the scientific sense, can be 10 times higher in bears. It says "for a given size," which indicates to me that it must mean some kind of skeleton as percentage of body mass. Or it's just made up, with no basis in observation.
Apr
24
comment Does the term “upper extremity” include hands?
I suspect that "hand" is separated out because it is often a surgical subspeciality. Hands are complicated.
Apr
23
answered Mammal vs Placental Mammal
Apr
22
awarded  Enlightened
Apr
22
awarded  Nice Answer
Apr
21
revised Applying kiwis on gelatin
Fixing spelling
Apr
21
revised What has caused life to choose this unfathomably tiny subset of all possible proteins?
Improve formatting
Apr
15
revised What is the mechanism behind plants losing their leaves?
Improving spelling
Apr
5
comment Bolyerine Snakes maxillary bone, split?
What figure(s) are you having trouble with in the paper?
Apr
3
comment The selective pressure of contraceptives
@canadianer Is there any work on novel selective pressures resulting from widespread use of contraceptives and can these selective pressures be modeled on the selective response in the same way as antibiotic resistance or strong truncating selection?
Apr
3
revised The selective pressure of contraceptives
Fixing up grammar
Apr
3
comment The selective pressure of contraceptives
The topic is certainly welcome. Your question was closed for being unclear rather than off topic. It would have been nice if any of those who voted to close would have explained why. I've editing the grammar a bit and given it some structure.
Apr
3
comment Why did humans evolved the scratch reflex?
Humans didn't evolve the scratch reflex. We inherited it from 350 million years of mammal ancestors.
Apr
1
reviewed Leave Closed Can humans survive without consuming life?
Mar
29
comment Why are killer whales found in the Gulf of Mexico smaller than ones found in the Pacific?
Has Bergmann's rule been suggested for the size disparity in Orca?
Mar
27
revised Why does polyploidy give an evolutionary advantage?
Retag
Mar
26
reviewed Approve Hand-eye coordination in 3D space
Mar
23
revised Genes-of-interest analysis between organisms
De-acronym the title
Mar
23
answered Serious question about a piece of meat