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Earth's earliest animals may have held evolution back because they reproduced asexually, creating low-competition communities that changed very little over time. When environmental pressures pushed them toward sexual reproduction, biodiversity ...

Scientists have uncovered new evidence that Stonehenge's six-ton Altar Stone was deliberately transported hundreds of kilometers from Scotland by ancient people. The feat would have required extraordinary planning, teamwork, and determination, ...

A surprising study suggests that chemicals introduced to protect the ozone layer may have unintentionally created a growing global pollution problem. Researchers found that refrigerants and certain anesthetic gases have generated more than 335,000 .. ...

Ancient grooves on human teeth, once hailed as evidence of tooth-picking, may simply be the result of natural wear, according to a new study of wild primates. The research also revealed that a common modern dental defect appears to be uniquely human, ...

Researchers have solved a decades-old mystery by showing that a cache of 43 helmets found off the Spanish coast is medieval, not Roman. The remarkable discovery exposes a thriving weapons trade network that connected Mediterranean powers during a ...

South Australia's koala population has grown so large that it may be heading toward a self-made disaster, with forests struggling to support the animals. Researchers say targeted fertility control could prevent widespread starvation and habitat ...

Scientists warn that free-living amoebae may be an underappreciated public health threat, capable of causing deadly infections and shielding other dangerous microbes from water treatment. Climate change and aging infrastructure could help these ...

Octopuses may be even smarter than we thought. Researchers at Dartmouth found that octopuses can learn to use mirrors to locate food hidden behind them--a skill previously seen only in vertebrates like mammals and birds. After training, the animals . ...

Mangroves are famous for trapping vast amounts of carbon, helping slow climate change. However, a new study suggests rising sea levels could eventually reduce that benefit across entire forests. As flooding becomes too extreme, mangroves may die off ...

Researchers have shown that controlled fire whirls can clean up oil spills faster and more cleanly than traditional burning methods. The spinning flames consumed up to 95% of the oil, cut soot emissions by 40%, and could help prevent spills from ...