Laika became the first living being to orbit Earth in 1957 aboard Sputnik 2. The mission proved that a mammal could survive launch and brief time in microgravity, but the spacecraft was not designed for recovery. Laika died within hours due to overheating, making her flight both a scientific milestone and an enduring ethical controversy. Follow @spaceeves #SpaceHistory #Laika #Sputnik2 #SpaceEve | SpaceEve

BREAKING | RDIF: New data from Gamaleya Center shows 1-shot Sputnik Light vaccine, 1st component of #SputnikV, is 70% effective against the Delta strain 3 months after injection, making it оne of the world’s leading standalone vaccines & and ideal booster for other vaccines. For the age group below 60, Sputnik Light’s efficacy is even higher, exceeding 75%, based on a Gamaleya study of 28,000 people. This compares with efficacy vs Delta for other vaccines falling below 50% within 5 months. MORE:

A leading medical journal has suggested the safety and efficacy of Russia's Covid jab is on par with the leading UK and US vaccines - and the Sputnik V vaccine is being delivered all over the world. Dani Isdale takes a look at Russia's vaccine rollout. | Channel 4 News

Find out how the #SputnikV vaccine works and what makes it safe and effective. We've made this short animation to explain the science behind Sputnik V. | Sputnik V