20 years in space, the exceptional odyssey of Mars Express - Space Watch Africa

Planetary Exploration of Mars

Introducing: A Watch With Mars Ambitions - Hodinkee

ESA - 20 years and counting: Mars Express in numbers

Earth=Mars: a snowball world

ExoMars (Exobiology on Mars - 2016 Mission) - eoPortal

International Space Station: Twenty Years of Continuous Human Presence by Faircount Media Group - Issuu

A look at new and old spacecraft that have travelled to Mars

Curiosity: Four years on Mars and still trekking

NASA's Odyssey Orbiter Marks 20 Years Of Mapping Mars

The Odyssey of Mars Express: Charting Two Decades of Red Planet Exploration

Challenges of Getting to Mars – NASA Mars Exploration

Astroscale unveiled update on the final phase of its End-of-Life Services - Space Watch Africa

The Best Photos of Earth and the Moon From Space

The Mars Global Surveyor Appears to Have Succumbed - The New York Times