Wind and wave energy are not strictly renewable sources of energy, says Axel Kleidon of the Max Planck Institute for Biogeochemistry in Jena, Germany. “Efforts to satisfy a large proportion of our energy needs from the wind and waves will sap a significant proportion of the usable energy available from the sun. In effect, he says, we will be depleting green energy sources. His logic rests on the laws of thermodynamics, which point inescapably to the fact that only a fraction of the solar energy reaching Earth can be exploited to generate energy we can use.”
For generations, physicists have been searching for a quantum theory of gravity. But what if gravity isn't actually quantum at all?
Embedded in a cell phone or in accessories such as rings, bracelets or watches, the novel tools aim to make it easier to manage hypertension. But they must still pass several tests before hitting the clinic.
Without even realizing it, we’ve actually become pretty god-like in our powers.
The study is a solid step toward developing gene therapies against neurodevelopmental disorders.
Lab experiments showed Caribbean box jellyfish are quick studies of their environment.