• The alcohol in wine evaporates faster than the water, and this creates a difference in surface tension and “legs” in the glass (4 April, p 16).
• Germán Martinez works at the Lunar and Planetary Institute in Texas (4 April, p 15).
• Investigations continue into whether the initial level of virus that infects a person, rather than the average infectious dose, correlates with disease severity for covid-19 (4 April, p 8).
