Tom and Blondey111, you people are simply great. And thanks to others, you guys may have noticed the fatal error. Anyway corrected figures:
Mosquito weight at 2.5 mg = 0.0025gms (w/o h_blood weight)
elephants weigh from 2.7 to 6 tons;
let's stay with the original 2 tons, assuming female with less ivory
Neurons figures remaining same: 250 B, 86 B and 140,000
Correction 2: Elephant has 3 times the brain and 28 times the weight
Finding Neurons / Weight ratios and comparing them turns out
Man is 9.8 times smarter than Elephant
and 22 times brighter than Mosquito
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These figures surfaced while searching for the percentage of neurons in human brain genetically scripted (or hardwired) at birth. Seems like babies can hear & recognize sound (mother's) from 7 month fetus; are born virtually blind but instantly begin to gain hazy sight
"The dogma is that after a certain age the brain is unable to process visual inputs it has never received before," explains cognitive scientist Amy Kalia of the Massachusetts Institute of Technology (MIT) in Cambridge.
Consequently, eye surgeons in India often refuse to treat children blinded by cataracts since infancy if they are over the age of seven. Such children are not usually found in wealthier countries such as the United States — where cataracts are treated as early as possible — but are tragically plentiful in India. - Nature
In other words, babies think visually by year one and considering neuron to weight ratios may actually be smarter than we think. For instance some babies just refuse to speak till age 2. helps negotiate better? - ahem.