The hypothetical clock's hands mark our nearness to annihilation.
The black diamond known as the "Enigma" will soon be sold at auction, but experts are unsure about the origins of the stunning gem.
The Doomsday Clock debuted 75 years ago to highlight the threat of nuclear weapons to our survival as a species, a risk now accompanied by escalating climate change and global pandemics.
The volcanic eruption that destroyed a Polynesian island on Saturday injected ash into record altitude but won't cause any disruption to Earth's climate, experts said.
New aerial photos show a blanket of dust and ash covering the Pacific nation of Tonga following a massive underwater volcanic eruption.
Reference Diamonds are unique among gemstones, with intriguing physical properties and practical applications far beyond jewelry.
A powerful underwater volcano eruption in Tonga on Saturday (Jan. 15) was captured as it happened in stunning satellite images.
A tsunami triggered by the explosive eruption of the underwater Tonga volcano in the Pacific Ocean slammed the shoreline of the Pacific nation Saturday (Jan. 15).
A satellite image captured by Landsat 8 shows Mount Vesuvius "peering" through an eerily circular hole in the clouds.
Reference These ancient cave decorations take thousands of years to appear, building up drip by painstaking drip
Turkmenistan's president Gurbanguly Berdymukhamedov ordered experts to close the 'Gates of Hell' - crater of burning natural gas in the Karakum desert
Archaeologists have unearthed the bones of a young man and a dog killed by an ancient tsunami along the Aegean coast.
Reference Geoengineering is the use of technology to alter Earth's climate. This can take place on Earth or in space
A collision with a Mars-size planet 4.5 billion years ago may have left a permanent impact on our planet's deep mantle.
Deforestation can include clearing the land for farming or livestock, or using the timber for fuel, construction or manufacturing.