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| The solar system may have a new smallest dwarf planet: Hygiea Oct 28 2019 12:00 PM New images reveal Hygiea is round, a final criterion for promoting the wee world from asteroid to dwarf planet status. READ MORE  |
| Bird eggs laid in cold climates are darker, which may keep eggs warm Oct 28 2019 12:00 PM A global survey of bird egg color reveals a simple trend: the colder the climate, the darker the egg. READ MORE |
| Dating questions challenge whether Neandertals drew Spanish cave art Oct 28 2019 6:00 AM A method used to date cave paintings in Spain may have overestimated the art's age by thousands of years, putting its creation after Neandertal times. READ MORE |
| Congolese giant toads may mimic venomous snakes to trick predators Oct 25 2019 8:00 AM If Congolese giant toads mimic venomous Gaboon vipers, it would be the first reported case of a toad imitating a snake. READ MORE |
| Quarrying stone for Easter Island statues made soil more fertile for farming Oct 25 2019 6:00 AM Easter Island's Polynesian society grew crops in soil made especially fertile by the quarrying of rock for large, humanlike statues, a study suggests. READ MORE |
| Bias in a common health care algorithm disproportionately hurts black patients Oct 24 2019 2:00 PM A machine-learning program that uses past medical costs to identify patients for extra care favors white patients over black patients, a study finds. READ MORE |
| Remarkable fossils capture mammals' recovery after the dino-killing asteroid Oct 24 2019 2:00 PM A fossil-rich site in Colorado is revealing how mammals rebounded and flourished after an asteroid strike 66 million years ago. READ MORE |
| Lab-grown organoids are more stressed-out than actual brain cells Oct 24 2019 12:26 PM Compared with real brain tissue, organoids show big differences. READ MORE |
| Piranhas and their plant-eating relatives, pacus, replace rows of teeth all at once Oct 24 2019 6:00 AM Piranhas and pacus both lose and replace all teeth on one side of their mouths in one go, which may help to distribute wear and tear. READ MORE |
| Strontium is the first heavy element detected from a neutron star merger Oct 23 2019 1:00 PM The discovery of strontium created inside a neutron star smashup gives the clearest picture yet of what goes on inside this chaotic environment. READ MORE |
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