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The idea of a multiverse — multiple realms of space differing in basic properties of physics — bugs some scientists. Others find it a real possibility that should not be ignored.
Our mark on Earth is so profound that some argue it’s time to bid goodbye to the current geological time period — the Holocene — in favor of a new one: the Anthropocene.
Astronomer Lisa Kaltenegger reckons the galaxy could contain as many as 40 billion habitable planets. Here, she speaks about the search for those faraway worlds and signatures of life.
Nanospheres that react with their surroundings to propel themselves might find applications in drug delivery
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