It's about as heavy as The Tongue of a Blue Whale
(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 42,000,000 grains. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about one-and-three-tenths times as heavy as a Rhinoceros
In other words, the weight of a Rhinoceros is 0.770 times 42,000,000 grains.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 32,000,000 grains. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about three-fourths as heavy as a Hippopotamus
In other words, 42,000,000 grains is 0.7260 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 1.380 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 57,900,000 grains. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about one-and-two-fifths times as heavy as a Giraffe
In other words, 42,000,000 grains is 1.410 times the weight of a Giraffe, and the weight of a Giraffe is 0.7090 times that amount.(Giraffa camelopardalis reticulata) (adult, male, maximum of range)
An adult, male giraffe can weigh up to 29,800,000 grains. Reaching 5.5 m (18 ft) in height by adulthood, giraffe calves can grow as much as 3 cm (1 in) per day.
It's about one-and-two-thirds times as heavy as a Car
In other words, 42,000,000 grains is 1.6470 times the weight of a Car, and the weight of a Car is 0.60720 times that amount.(for 2009 Ford Taurus) (curb weight)
A 2009 Ford Taurus weighs 25,490,000 grains. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 5,957,000 grains.
It's about half as heavy as an Elephant
In other words, 42,000,000 grains is 0.450 times the weight of an Elephant, and the weight of an Elephant is 2.20 times that amount.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 94,000,000 grains. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 62,000,000 grains
It's about two-fifths as heavy as a Tyrannosaurus rex
In other words, 42,000,000 grains is 0.430 times the weight of a Tyrannosaurus rex, and the weight of a Tyrannosaurus rex is 2.30 times that amount.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
The notable Tyrannosaurus specimen housed at the Field Museum of Natural History in Chicago, Illinois, "Sue," is estimated to have weighed about 99,000,000 grains while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.