R. Tagore and his wife Mrinalini Devi, 1883 —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=764023

Young Rabindranath Tagore in London, 1879 —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=14827264

Debendranath Tagore —
Photo Credit: By Abanindranath Tagore (died December 5, 1951} - Public Domain, https://commons.wikimedia.org/w/index.php?curid=17870072

Dwarkanath Tagore — Bust at the National Library, Kolkata
Photo Credit: By Arjun Sarup - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=50338048

Rabindranath Tagore, c 1925 —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=47866012

The birthplace of Hegel in Stuttgart, which now houses the Hegel Museum —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=693493

Georg Wilhelm Friedrich Hegel, 1831 —
Photo Credit: By Jakob Schlesinger - Public Domain, https://commons.wikimedia.org/w/index.php?curid=60343060

The Tübinger Stift — A hall of residence and teaching; it is owned and supported by the Evangelical-Lutheran Church in Württemberg, and located in the university city of Tübingen, in South West Germany
Photo Credit: By Kim Traynor - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=33511949

Isolation of Argon — A: test-tube, B: dilute alkali, C: U-shaped glass tube, D: platinum electrode
Photo Credit: By Encyclopædia Britannica - Public Domain, https://commons.wikimedia.org/w/index.php?curid=32882745

Argon —
Photo Credit: (c) 2021 alasnome.com

John William Strutt, 3rd Baron Rayleigh —
Photo Credit: By Unknown author - Public Domain, https://commons.wikimedia.org/w/index.php?curid=405463