¿Por qué se celebra el Día Mundial del cerebro?

#iguru_soc_icon_wrap_6a93f5d60a14d a{ background: transparent; }#iguru_soc_icon_wrap_6a93f5d60a14d a:hover{ background: transparent; border-color: #2c8fa0; }#iguru_soc_icon_wrap_6a93f5d60a14d a{ color: #2c8fa0; }#iguru_soc_icon_wrap_6a93f5d60a14d a:hover{ color: #ffffff; }.iguru_module_social #soc_icon_6a93f5d60a1981{ color: #ffffff; }.iguru_module_social #soc_icon_6a93f5d60a1981:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a93f5d60a1981{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1981:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1b22{ color: #ffffff; }.iguru_module_social #soc_icon_6a93f5d60a1b22:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a93f5d60a1b22{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1b22:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1bf3{ color: #ffffff; }.iguru_module_social #soc_icon_6a93f5d60a1bf3:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a93f5d60a1bf3{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1bf3:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1d24{ color: #ffffff; }.iguru_module_social #soc_icon_6a93f5d60a1d24:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a93f5d60a1d24{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1d24:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1de5{ color: #ffffff; }.iguru_module_social #soc_icon_6a93f5d60a1de5:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a93f5d60a1de5{ background: rgba(44,143,160,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1de5:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1e96{ color: #ffffff; }.iguru_module_social #soc_icon_6a93f5d60a1e96:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6a93f5d60a1e96{ background: rgba(44,143,160,0.01); }.iguru_module_social #soc_icon_6a93f5d60a1e96:hover{ background: rgba(255,255,255,0.01); }