This week's element is thallium, which goes by the symbol Tl and the atomic number, 81. Thallium was discovered in 1861 by spectroscopy and named by British chemist Sir William Crookes. Its name comes ...

For decades, thallium was one of the hardest poisons to identify. Tasteless, odorless, and slow-acting, it caused symptoms ...

The sun, the essential engine that sustains life on Earth, generates its tremendous energy through the process of nuclear fusion. At the same time, it releases a continuous stream of ...

ST. CLOUD — The substance suspected of being used to kill a St. Cloud man earlier this year has a deadly legacy, tied to assassinations, mass poisonings and Cold War-era plots. Cody Ray Ernst, 33, of ...

Thallium is a dangerous and carefully regulated poison, once widely available but mostly found in laboratories these days. "It's either attempted suicide or homicide," he said. Marcus added that he ...

Thallium, the substance that seems to have caused the former Russian spy Alexander Litvinenko to be admitted to a London hospital, is frequently referred to as the poison of choice. A colourless, ...

MOORHEAD — The man arrested this week in Moorhead for murder searched numerous times for how thallium, a highly toxic and odorless metal, could be used as poison and how much and how long it would ...

The first sign that something was wrong was numbness in his feet. Then things got rapidly and severely worse. It was August 2012, and soon, a chemistry PhD student in the UK would be fighting for his ...

EX-Russian spy Sergei Skripal and his daughter were poisoned with a nerve agent in Salisbury last year. The pair were “targeted specifically” when they were dosed by a rare and deadly nerve agent, ...