Tropical honeybees are continuing to challenge the idea that a ?nuclear winter? enshrouded the earth for years after the famous meteorite impact in Mexico that killed the dinosaurs 65 million years ago. A US researcher says that the survival of Cretotrigona prisca beyond the Cretaceous extinction confirms that it could not have been cold for long.
Saturn?s ring system constantly emits a melodic series of distinct musical notes as radio waves, produced by the impact of a meteoroid on the icy chunks that make up the rings. Reducing their frequencies for human hearing by wave detectors on board the Cassini spacecraft, University of Iowa researchers heard 1-3 second-long notes.
A cosmic ?bubble? of ionised hydrogen gas formed around galaxies will explain a 12-billion-year-old era of the Universe when the first stars and galaxies formed, known as the end of the dark ages, say US-Australian researchers. Astronomers can now ?see? these bubbles as 3D ?holes? in a radio picture of the Universe through a yet-to-be designed telescope, reports Nature.
