4. The letter mysteriously arrived at the California University of Pennsylvania, in the north-eastern state of Pennsylvania, 10 days ago. Written to Mr Moore, the two-page letter was postmarked 20 February 1958 and signed "love forever Vonnie".
2. The app D'Aloisio designed, Summly, compresses long pieces of text into a few representative sentences. When he released an early iteration, tech observers realized that an app that could deliver brief, accurate summaries would be hugely valuable in a world where we read everything-from news stories to corporate reports-on our phones, on the go. The app attracted the interest of investors around the world, ranging from Hollywood celebrities to Hong Kong billionaire Li Ka-shing, the wealthiest man in Asia.
2. Whiteness, in this context, is more than just skin color. You could define it as membership in the “ethno-national majority,” but that’s a mouthful. What it really means is the privilege of not being defined as “other.”
3. For those outside the scientific community, the response to the retraction has been mixed.
Wang Chunfa, executive secretary of the China Association for Science and Technology, has expressed deep concern over the retraction, which came just days after he met in Beijing with Arnout Jacobs, the head of Springer Nature for Greater China.