TechnologyQuantum neural network may be able to cheat the uncertainty principle Calculations show that injecting randomness into a quantum neural network could help it determine properties of quantum objects that are otherwise fundamentally hard to access ¿ìè¶ÌÊÓÆµ
HumansHunting with poison arrows may have begun 60,000 years ago in Africa A collection of arrow points excavated in South Africa has provided the oldest direct evidence of hunters deploying plant-based poisons on their weapons, a practice that has continued into modern times in some traditional cultures ¿ìè¶ÌÊÓÆµ