Finnish authorities are investigating a mysterious spike in levels of radioactive caesium-137 detected over Helsinki.
Hurricane Gonzalo gained strength in the Atlantic as it barreled toward Bermuda, which was bracing for a hit from the powerful Category Four storm.
Natural disasters claimed over 22,000 lives last year, with Typhoon Haiyan in the Philippines the deadliest of all, the Red Cross said.
Hurricane Gonzalo churned in the Atlantic, bringing intense winds and threatening to deluge the Bahamas, US forecasters said.
Gonzalo strengthened to a "major hurricane" over the open Atlantic and was expected to continue gaining force, forecasters said.
Security has been tightened in Saint Peter's Square after intelligence services intercepted a possible plan to attack the Vatican.
Authorities imposed restrictions on the water supply in Mexico, after toxic substances from a nearby mine reportedly turned a river orange.
A biological catastrophe may unfold in southern Kazakhstan.
The world is becoming an increasingly dangerous place for refugees and migrants.
Health experts warned Monday about serious risks from the "Cinnamon Challenge," a game popular with US teens, who ingest a spoonful of the pungent spice, then try to refrain from drinking water.
Scientists have urged New Zealand to take immediate action to protect the critically endangered Maui's dolphin, amid warnings the marine mammal could become extinct by 2030.
The Syrian regime has begun using missiles and barrel bombs against rebels, a top US official said Wednesday, signaling a dangerous escalation of the deadly 21-month-old conflict.
Government radiation monitoring in areas near Japan's crippled Fukushima nuclear plant is unreliable, Greenpeace charged on Tuesday, with heavily populated areas exposed to 13 times the legal limit.
Hired assassins are stalking witnesses to a Philippine massacre in which a political warlord allegedly led the slaughter of 57 people, victims' relatives and a rights group said almost two years into a complex trial.
US nuclear regulators published an update on California's troubled San Onofre power plant Thursday, sparking an expert warning that the problem is more serious than first thought.
State Sanitary and Epidemiological Supervision Department have warned Almaty city and Almaty oblast citizens about ixodic ticks wakeup.
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