Uncategorized
- Earth
Gasp! Ozone limits don’t protect babies
In healthy infants, even ozone concentrations well below those allowed by federal law trigger asthmalike symptoms.
- Astronomy
Spewing superdust
Astronomers have identified a type of supernova as the main source of space dust.
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19691
Tiktaalik may not have left the water by choice, to avoid predators, or to get more oxygen. Instead, it might have found itself left behind on a muddy floodplain each time waters receded with the tide. Tiktaalik ‘s “limbs” were probably first developed to survive in an environment that required bracing and stabilizing against currents, […]
- Paleontology
Amphibious Ancestors
Newly discovered fossils from Greenland, as well as a reexamination of those of previously known creatures, are providing researchers with additional insights into ancient vertebrates' move from water to land.
