Ugo Mellone / Acacia tree at dusk, Sahara desert, Djebel Ouarkziz, Southern Morocco, Africa. March, 2016.

Ugo Mellone / Acacia trees and Sahara desert dunes, Djebel Ouarkziz, Southern Morocco, Africa. February, 2020.

Ugo Mellone / Acacia tree in a Saharan sandstorm, Southern Morocco, Africa. March, 2020.

Ugo Mellone / Photographer, Ugo Mellone, searching for wildlife, Draa gueltas, Southern Morocco, Africa. December, 2019.

Ugo Mellone / Acacia trees and dunes below the northern slopes of Djebel Ouarkziz, Sahara desert, Southern Morocco, Africa. February, 2020.

Ugo Mellone / Acacia tree and sand dunes, Sahara desert, Erg Ouzina, Southern Morocco, Africa. December, 2009.

Marie Lochman / Mimosa creek on sandstone plateau, Blackdown Tableland National Park, southern Queensland, Australia, February 2013

Marie Lochman / Mimosa creek on sandstone plateau, Blackdown Tableland National Park, southern Queensland, Australia, February 2013

Denis-Huot / Termite hill and acacia tree, Shaba national reserve, North Kenya

Adrian Davies / Sensitive plant (Mimosa pudica) leaves. Stroboscopic image showing collapse of stem following stimulation. Native to South and Central America.

Will Watson / Khomas Hochland featuring highland shrubland with Acacia in flower, Daan Viljoen Game Reserve, Namibia, January.

Philippe Clement / Sensitive plant (Mimosa pudica) close-up of leaflets folding inwards, native to South America and Central America. May