RT @HUBBLE_space: Don't forget! Today at 16:00 CEST it's Q&A time with the researchers that detected ozone in the Earth atmosphere during a… 7 hours ago
RT @gabrielpeyre: Oldies but goldies: J. B. Kruskal, On the shortest spanning subtree of a graph and the traveling salesman problem, 1956.… 8 hours ago
RT @CARAA_Center: Nubian necklace with gold pendants of human and ram heads, spaced with carnelian beads. 270 BCE - 320 CE. Museum of Fine… 8 hours ago
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Posted by Steven Pigeon 