“Therefore the solid body of the earth is reasonably considered as being the largest relative to those moving against it and as remaining unmoved in any direction by the force of the very small weights, and as it were absorbing their fall. And if it had some one common movement, the same as that of the other weights, it would clearly leave them all behind because of its much greater magnitude. And the animals and other weights would be left hanging in the air, and the earth would very quickly fallout of the heavens. Merely to conceive such things makes them appear ridiculous.” IfsBodyWould BeEarthMovingScienceFallLeftForceHeavenAnimalCommonBehindsGreaterAirMovementWeightRidiculousRelativeGravityMagnitudeAbsorbingFalloutsLeft Hanging Author:Ptolemy
“Lemurs are good parents but they do it in different ways. I originally studied father care. I was very interested in that and we saw that a lot of these animals that lived in pairs and the father wasn't doing anything at all for the first month. But then suddenly, when the baby got to be a certain weight then the dads chipped in and started carrying the babies which was very nice. And then if there was twins or triplets then they helped.” IfsWayFirstsDifferentCareCertainFatherParentAnimalSawsNiceBabyMonthsDadWeightDifferent WaysPairsTwinsVery NiceGood ParentTripletLemurs Author:Patricia Wright
“The Bactrian have two humps; the Arabian one only. They are swift in battle and most useful to carry burdens. This animal is extremely observant of rule and measure, for it will not move if it has a greater weight than it is used to, and if it is taken too far it does the same, and suddenly stops and so the merchants are obliged to lodge there.” IfsDoeTwoMovingUsedAnimalTakenGreaterBattleWeightBurdenObligedMerchantsObservantLodgesArabian Book:The notebooks of Leonardo da Vinci Source: The notebooks of Leonardo da Vinci
“The proportion between the velocity with which men or animals move, and the weights they carry, is a matter of considerable importance, particularly in military affairs.” MenMatterMovingAnimalMilitaryWeightImportanceAffairProportionVelocity Book:On The Economy Of Machinery And Manufactures Source: On The Economy Of Machinery And Manufactures