¿Por qué se celebra el Día Mundial del cerebro?

#iguru_soc_icon_wrap_6a5483f0e8b08 a{ background: transparent; }#iguru_soc_icon_wrap_6a5483f0e8b08 a:hover{ background: transparent; border-color: #2c8fa0; }#iguru_soc_icon_wrap_6a5483f0e8b08 a{ color: #2c8fa0; }#iguru_soc_icon_wrap_6a5483f0e8b08 a:hover{ color: #ffffff; }.iguru_module_social #soc_icon_6a5483f0e8b561{ color: #ffffff; }.iguru_module_social #soc_icon_6a5483f0e8b561:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a5483f0e8b561{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b561:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b722{ color: #ffffff; }.iguru_module_social #soc_icon_6a5483f0e8b722:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a5483f0e8b722{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b722:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b7f3{ color: #ffffff; }.iguru_module_social #soc_icon_6a5483f0e8b7f3:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a5483f0e8b7f3{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b7f3:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b8a4{ color: #ffffff; }.iguru_module_social #soc_icon_6a5483f0e8b8a4:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a5483f0e8b8a4{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b8a4:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b955{ color: #ffffff; }.iguru_module_social #soc_icon_6a5483f0e8b955:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a5483f0e8b955{ background: rgba(44,143,160,0.01); }.iguru_module_social #soc_icon_6a5483f0e8b955:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a5483f0e8ba06{ color: #ffffff; }.iguru_module_social #soc_icon_6a5483f0e8ba06:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a5483f0e8ba06{ background: rgba(44,143,160,0.01); }.iguru_module_social #soc_icon_6a5483f0e8ba06:hover{ background: rgba(255,255,255,0.01); }