By Robert Matthews - Strangelets - sometimes also called strange-quark nuggets - are predicted to have many unusual properties, including a density about ten million million times greater than lead. Just a single pollen-size fragment is believed to weigh
Darwin is the Unix-derived core that provides the underlying foundation for Mac OS X. At Darwin's heart is the XNU kernel--a Mach 3.0-based microkernel that has been modified to include portions of FreeBSD for performance reasons.