[Spanish] [Ráfaga]: Nº418: residents, arsenic, Navarra, days, trenches

[Raquel Alegre]

The European diaspora: Map of residents living in other countries via
@realivansanchez:
http://metrocosm.com/eu-diaspora-map/

Map of the arsenic concentration in the Spanish peninsula via
@realivansanchez:
http://elpais.com/elpais/2016/06/28/ciencia/1467135035_604531.html

All of Navarra's geodata freely available on the net via @realivansanchez:
http://www.noticiasdenavarra.com/2016/06/20/sociedad/navarra/mas-de-160000-archivos-de-informacion-cartografica-de-navarra-se-pueden-descargar-gratuitamente-de-internet-

Maps showing various aspects of day length on the planet via
@realivansanchez:
http://us-climate.blogspot.com.es/2016/06/daylight-twilight-astronomical-maps.html

Trenches of the Great War today in orthophotos via @realivansanchez:
http://www.invisibleworks.co.uk/trench-ghosts-part-4/

Ivan-vspyshka-15

Raf
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