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 ...

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 ...

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

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, ...

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, ...

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 ...

A 22-year-old former Lehigh University student will face charges that he tried to poison his roommate using thallium and other chemicals, Northampton County District Attorney John Morganelli announced ...

LONDON — Doctors treating former Russian spy and fierce Kremlin critic Col. Alexander Litvinenko said today that test results showed it was unlikely he had been poisoned by the toxic metal thallium ...

MOSCOW – The U.S. Embassy on Wednesday confirmed that two American women have been hospitalized in Moscow for possible thallium poisoning. The spokesman identified the women as Marina Kovalevsky and ...

OSAKA--Thallium was detected in the comatose aunt of a man detained on suspicion of using the highly toxic substance to kill a female acquaintance, police said. Just 1 gram of thallium is enough to ...