This week on Ask Science Mike, we covered the following questions:1. Is the soil on Mars sterile?2. Do blue-blockers really work?Are Computer Glasses Worth It?The effect of blue-light blocking spectacle lenses on visual performance, macular health and the sleep-wake cycle: a systematic review of the literature.3. What's the science behind cults?Cult Education Institute FAQThis episode was made possible by these amazing sponsors:KiwiCo: send the gift of learning to a child in your life this holiday season. Learn more at https://kiwico.com/scienceBiologos: check out my conversation Jim Stump on the podcast The Language of God.