An analysis of the distribution of helium-isotope ratios in oceanic extrusions from Earth's mantle seems to establish a connection with the spread of ages in continental crust. What mechanism might underlie this?

In fruit flies, a few very large genes generate the small RNAs that silence parasitic DNA elements. These RNAs might also participate in an amplification circuit that increases their potency.

The experimental violation of mathematical relations known as Bell's inequalities sounded the death-knell of Einstein's idea of 'local realism' in quantum mechanics. But which concept, locality or realism, is the problem?