<P> In the second half of the 20th century, developments in chemistry, electron microscopy, genetics, computer science, functional brain imaging, and other fields progressively opened new windows into brain structure and function . In the United States, the 1990s were officially designated as the "Decade of the Brain" to commemorate advances made in brain research, and to promote funding for such research . </P> <P> In the 21st century, these trends have continued, and several new approaches have come into prominence, including multielectrode recording, which allows the activity of many brain cells to be recorded all at the same time; genetic engineering, which allows molecular components of the brain to be altered experimentally; genomics, which allows variations in brain structure to be correlated with variations in DNA properties and neuroimaging . </P> <P> Animal brains are used as food in numerous cuisines . </P> <P> Some archaeological evidence suggests that the mourning rituals of European Neanderthals also involved the consumption of the brain . </P>

The brain contains approximately 10 million neurons that are connected via electrochemical pulses