¿Por qué se celebra el Día Mundial del cerebro?

#iguru_soc_icon_wrap_6801c5f8620ba a{ background: transparent; }#iguru_soc_icon_wrap_6801c5f8620ba a:hover{ background: transparent; border-color: #2c8fa0; }#iguru_soc_icon_wrap_6801c5f8620ba a{ color: #2c8fa0; }#iguru_soc_icon_wrap_6801c5f8620ba a:hover{ color: #ffffff; }.iguru_module_social #soc_icon_6801c5f8621051{ color: #ffffff; }.iguru_module_social #soc_icon_6801c5f8621051:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6801c5f8621051{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f8621051:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f86211f2{ color: #ffffff; }.iguru_module_social #soc_icon_6801c5f86211f2:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6801c5f86211f2{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f86211f2:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f86212a3{ color: #ffffff; }.iguru_module_social #soc_icon_6801c5f86212a3:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6801c5f86212a3{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f86212a3:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f8621354{ color: #ffffff; }.iguru_module_social #soc_icon_6801c5f8621354:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6801c5f8621354{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f8621354:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f86213e5{ color: #ffffff; }.iguru_module_social #soc_icon_6801c5f86213e5:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6801c5f86213e5{ background: rgba(44,143,160,0.01); }.iguru_module_social #soc_icon_6801c5f86213e5:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6801c5f8621476{ color: #ffffff; }.iguru_module_social #soc_icon_6801c5f8621476:hover{ color: #2c8fa0; }.iguru_module_social #soc_icon_6801c5f8621476{ background: rgba(44,143,160,0.01); }.iguru_module_social #soc_icon_6801c5f8621476:hover{ background: rgba(255,255,255,0.01); }