The Washington National Zoo's giant panda Mei Xiang gave birth to two miniscule baby on August 23rd. Weighing in at just 86 grams and 138 grams, the two blind little cubs were dwarfed by their 238-pound mother - who weighed over a thousand times more than her smaller baby.
The extreme tininess of these babies might seem unusual - panda mothers typically weigh 900 times more than their newborns, while human mothers are only around 20 times heavier than their babies. But in fact, mammals' infants come in a huge range of sizes.
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