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Place {{Human spaceflight timeline}} at the end of an article, but above any categories.
This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.
To change this template's initial visibility, the |state= parameter may be used:
{{Human spaceflight timeline|state=collapsed}}will show the template collapsed, i.e. hidden apart from its title bar.{{Human spaceflight timeline|state=expanded}}will show the template expanded, i.e. fully visible.{{Human spaceflight timeline|state=autocollapse}}will show the template autocollapsed, i.e. if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar, but if not, it is fully visible.