The Transit of Venus will occur next week, the last time until 2117; A novel water filter made from rice husks and clay in use in Cambodia; It's 80 years since the discovery of the neutron. Show more
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The Transit of Venus will occur next week, the last time until 2117; A novel water filter made from rice husks and clay in use in Cambodia; It's 80 years since the discovery of the neutron. Show more