Anxious moment for scientists in US, China and UAE as spacecrafts enter crucial stages of long journey to red planet [https://www.theguardian.com/science/2021/feb/07/tensions-rise-as-rival-mars-probes-approach-their-final-destination?CMP=fb_gu&utm_medium=Social&utm_source=Facebook#Echobox=1612710996](https://www.theguardian.com/science/2021/feb/07/tensions-rise-as-rival-mars-probes-approach-their-final-destination?CMP=fb_gu&utm_medium=Social&utm_source=Facebook#Echobox=1612710996)