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The largest brains are those of sperm whales, weighing about 8 kg (18 lb). An elephant's brain weighs just over 5 kg (11 lb), a bottlenose dolphin's 1.5 to 1.7 kg (3.3 to 3.7 lb), whereas a human brain is around 1.3 to 1.5 kg (2.9 to 3.3 lb). Brain size tends to vary according to body size. The relationship is not proportional, though: the ...
They have one of the highest brain-to-body mass ratios [28] and the largest brain size of all fish. [29] Their brains have retia mirabilia which may serve to keep them warm. [30] M. alfredi has been shown to dive to depths over 400 metres (1,300 ft), [31] while the Chilean devil ray, which has a similar structure, dives to nearly 2,000 metres ...
The human brain contains 86 billion neurons, with 16 billion neurons in the cerebral cortex. [ 2 ] [ 1 ] Neuron counts constitute an important source of insight on the topic of neuroscience and intelligence : the question of how the evolution of a set of components and parameters (~10 11 neurons, ~10 14 synapses) of a complex system leads to ...
The oceanic manta has one of the largest brains, weighing up to 200 g (7.1 oz) (five to ten times larger than a whale shark brain). It heats the blood going to its brain and is one of the few animals (land or sea) that might pass the mirror test, seemingly exhibiting self-awareness. [26]
Although brain size doesn’t necessarily indicate more brain power, elephants have an incredible memory because their cerebral cortex is so big. This is the brain area that stores long-term memories.
The sperm whale brain is the largest known of any modern or extinct animal, weighing on average about 7.8 kilograms (17 lb) [61] [62] (with the smallest known weighing 6.4 kilograms (14 lb) and the largest known weighing 9.2 kilograms (20 lb)), [44] [45] more than five times heavier than a human brain, and has a volume of about 8,000 cm 3. [63]
BrainMaps is an NIH-funded interactive zoomable high-resolution digital brain atlas and virtual microscope that is based on more than 140 million megapixels (140 terabytes) of scanned images of serial sections of both primate and non-primate brains and that is integrated with a high-speed database for querying and retrieving data about brain ...
According to data compiled from 1,786 Black and 7,350 white participants ages 9 to 10, racial disparities were reflected in differing adversity outcomes for each group.