➀ NASA's Viking 1 spacecraft, which landed on Mars in 1975, may have inadvertently killed potential Martian life during an experiment; ➁ Astrobiologist Dirk Schulze-Makuch suggests that the water-based testing methods used could have been too harsh for Martian microbes; ➂ Schulze-Makuch recommends that NASA use multiple life-testing processes for Martian samples.

➀ SpaceX has introduced 'Marslink', a concept for high-speed internet between Mars and Earth using an adaptation of its Starlink satellite network. ➁ The system aims to provide a data relay capable of transmitting 4Mbps or more across the distance between the planets. ➃ SpaceX presented Marslink to NASA with the aim of establishing a high-speed data relay system.

1. NASA's Mars rover discovered a rock with potential signs of ancient life. 2. The rock shows calcium sulfate veins, organic compounds, and 'leopard' spots, all indicative of microbial life. 3. This is the first time all three signs have been found together on Mars.