Tag Info

Hot answers tagged

20

Wow, as an astrophysicist who has just logged into biology SE for the first time, I didn't think I'd have a question I could immediately answer. You are correct about the Sun's output, so what about the lion. If the lion is in its usual passive state, i.e. lying around as shown in your picture, then you would not go far wrong in treating them as black body ...


6

The sun will win until you have enough lions to form a star sized mass. Assuming that your lions have an average mass of 200kg, which is probably pretty close, 1 trillion lions has a mass of 2×1014 kg, which is pretty close to the mass of Remus, a moon around the asteroid Sylvia. The mass of the sun is about 2×1030 kg. So your lions would have enough mass ...


6

Your dog finds these things palatable, I assure you, and no gag-reflex suppression is needed. I had a dog that would steal duck eggs from my flock, bury them all over the place, and dig them up when properly rotted to enjoy as a treat, and no, I'm not making this up. I saw her do it, ran across many buried duck eggs while gardening, and could immediately ...


5

I don't know about all known animals, or actual cell count. However, males of the wasp Dicopomorpha echmepterygis are considered the smallest known insects with a body size of 139 μm. This should at least be a contender for smallest animal. As a reference point, C. elegans are usually about 1mm long. However, given that we know only about 10% of the ...


5

When birds sleep, they do experience NREM sleep [1]. Furthermore, Kavanau (2002) concluded that NREM has evolved in warm blooded animals [2]. Birds provide a unique opportunity to evaluate current theories for the function of sleep. Like mammalian sleep, avian sleep is composed of two states, slow-wave sleep (SWS) and rapid eye-movement (REM) sleep that ...


3

I'm going to work this from the angle of power the animals could produce for an extended (e.g. 1 hour) time. I'll assume that a lion produces power somewhere between that of a human and a horse, since the typical weight of a lion (180 kg/400 lb-ish for males) is between that of a human (80 kg/180 lb-ish for males) and a horse (850 kg/1800 lb-ish for draft ...


3

Rotifers are microscopic protostomes with around 1000 cells apiece. This website claims the smallest rotifers have less than 100 cells, but I couldn't confirm this. Most rotifers are eutelic — within a given species, each adult individual has the same number of cells (Encyclopeia of Life: Rotifers). (Source) Edit: Myxozoans might be even smaller. These ...


2

Preamble This is a very interesting question one which I don't immediately know an answer to. I think this overly succinct answer and the fact nobody else has answered highlights the degree to which the age old darwinian assumptions play a role in the field. Zoological POV I'm not an expert in this area so I went to a zoology lab technician and this is ...


1

Some of the smallest animals have only one cell. Paramecium Aurelia


1

It is known that Grizzly bears catching salmon during times of plenty only eat the head (the fish brain, as any brain, is rich in fats, easy to digest and basically luxury food). However, in times of shortage they consume pretty much the whole fish, as every scrap of food, even untasty and non-nutricious tail fins and the likes are better than nothing. Your ...



Only top voted, non community-wiki answers of a minimum length are eligible