When mammals captured the gene, they used it in the placenta to create a layer of fused cells through which mothers can send nutrients to their embryos.
Both cases, says physicist Brian Greene, are possibilities, but if the latter is true, so is another posit: There are only so many ways matter can arrange itself within that infinite universe.
To explain the fact that we've got free will, so the objection goes, we have to appeal to — we have to posit — the existence of a soul, something non-physical, something more than purely physical.
He says attaching great importance to the global warming, China has released national plans to address climate change, energy saving and pollutant discharge reduction.
Scientists are hot on the tail of one of nature?s most elusive substances, the mysterious dark matter that is thought to make up the bulk of the universe.