On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.

I went to my rest a sober man, content with the stable progression of elements I found to be more reliable than any prayer. Sleep came easily. I went deep, then deeper, until in a single instant I ...

The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...

On the Duty to Resign in Protest — and Its Limits New Polling Offers a Terrifying Vista of Democrats’ Possible Future The Annoying Associated Press vs. White House ‘Gulf of America’ Fight ...

Anand Teltumbde’s 'Iconoclast: The Life and Legacy of Dr B.R. Ambedkar' is an insightful biography that goes beyond the conventional portrayals of Dr Bhimrao Ambedkar, one of India’s most celebrated ...

However, Irene’s reign is most closely associated with the tumultuous period of Iconoclasm – the theological dispute over the veneration of religious images. Following decades of iconoclastic policy, ...

Irene’s significant policy was ending iconoclasm, which divided the Eastern Roman Empire between iconoclasts and iconophiles from 726 to 787 AD. She supported the iconophiles, who believed in the ...