Top news for 2021-04-22

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Faster air exchange in buildings not always beneficial for coronavirus levels

Natural Cosmic Telescope Helps ALMA Discover Rotating Infant Galaxy

Most Women at High-Risk of Breast Cancer Are Unaware of Preventative Medicines

Climate Change Could Cut World Economy by $23 Trillion in 2050, Insurance Giant Warns

Know your ally: Cooperative male dolphins can tell who's on their team

Next generation of swimming biobots can self-train, showing striking speed and strength

The Oil Spill That Inspired Earth Day

NASA's Perseverance Rover Makes Oxygen on Mars for First Time

Perseverance rover just made oxygen on Mars

US military picks 3 companies to test nuclear propulsion above low-Earth orbit