In this edition of Tech It Out, we continue with our "Science Behind Virus" series, talking about how the developing of vaccine for coronavirus is in a race against time.

On Science Saturday, we review several major science news of the past two weeks, including China naming first mission to Mars "Tianwen-1", the 7th batch of Starlink satellites launched by Space X, a stunning image of the "Cosmic Reef" in the Milky Way marking the 30th anniversary of Hubble Space Telescope, and the glowing tobacco plant that radiates a mysterious green gleam.