Animals downsize after boosted carbon dioxide levels and soaring temperatures.
The estimate also comes with a price tag for describing all these Earth species, most of which are still unknown: $364 billion.
A genetically distinct population of honey bees has been found, isolated in the Libyan desert for the last 10,000 years.
Top predators from Belize to Massachusetts carry drug-resistant forms of bacteria. They could be passing it back to humans on our dinner plates.
The oldest known bat fossil yields important clues to bats' unique senses.
Eating poisonous invasive plants whetted the appetite of eastern Australian blue-tongue lizards for invasive cane toads.
The new term "hydrothermal seep" describes extreme temperatures colliding at frigid depths.
Using ancient plant ashes, scientists reconstructed a history of Earth's atmospheric oxygen levels over the last 400 million years, and laid to rest some lingering doubts about mass extinctions.
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