Made by humans on Earth. Since 2003.
Lichens on a tree branch

Lichens

A bottle and glass of Swedish mead

Mead

Ice-nine (artist's conception)

Polywater

A mosquito

Malaria

Maree Man geoglyph at Finnis Springs near Maree

The Marree Man

A portion of Guédelon castle under construction in 2012

Guédelon Castle

Woman with eyes closed

Lucid Dreams