It's about one-three-hundredth as heavy as The Tongue of a Blue Whale
In other words, 0.00000000910 megatonnes is 0.0034 times the weight of The Tongue of a Blue Whale, and the weight of The Tongue of a Blue Whale is 290 times that amount.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 0.00000270 megatonnes. 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 400 times as heavy as a Battery (AA)
In other words, 0.00000000910 megatonnes is 380 times the weight of a Battery (AA), and the weight of a Battery (AA) is 0.0026 times that amount.(Alkaline)
An "AA" size battery weighs 0.0000000000240 megatonnes. AA batteries came into common use during World War II and were given their name by the American National Standards Institute (ANSI) Committee C18 because they were smaller than the "A" size batteries which were invented first.
It's about one-four-hundredth as heavy as a Hippopotamus
In other words, 0.00000000910 megatonnes is 0.00243 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 412 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 0.000003750 megatonnes. 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 450 times as heavy as a Mouse
In other words, the weight of a Mouse is 0.0023 times 0.00000000910 megatonnes.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 0.0000000000210 megatonnes. While most mice typically live two to three years, the Methuselah Mouse Prize — an award administered by a non-profit organization which advances aging-related research — was once awarded to a team of scientists whose research resulted in a mouse living just under five years.
It's about 600 times as heavy as a Compact disc
In other words, 0.00000000910 megatonnes is 610 times the weight of a Compact disc, and the weight of a Compact disc is 0.0016 times that amount.(a.k.a. CD)
A compact disc typically weighs 0.0000000000150 megatonnes. Data is stored on CDs by encoding into the track a series of tiny pits — each between 3.5 and 850 µm (0.00014 and 0.033 in) in length.
It's about one-six-hundred-fiftieth as heavy as an Elephant
In other words, the weight of an Elephant is 670 times 0.00000000910 megatonnes.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 0.00000610 megatonnes. 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 0.00000400 megatonnes
It's about one-seven-hundredth as heavy as a Tyrannosaurus rex
In other words, 0.00000000910 megatonnes is 0.0014 times the weight of a Tyrannosaurus rex, and the weight of a Tyrannosaurus rex is 710 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 0.00000640 megatonnes while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.