Sky watchers, take note. The Orionid meteor shower peaks early tomorrow morning, lighting up the darkness with the remnants of Halley's Comet.

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There have now been more than 40 million cases of coronavirus recorded worldwide. As the numbers tick up, vaccine trials are evolving. The UK government signed a contract for the first human challenge studies, in which healthy volunteers are deliberately infected with the coronavirus in a controlled setting, and some receive an experimental vaccine. That's a different process than a typical Phase 3 trial, in which volunteers are given the vaccine with the assumption that at least some of them will be exposed to the virus in their daily lives. In the US, Johnson & Johnson and the FDA are still mum on why the pharmaceutical giant paused its coronavirus vaccine trial last week. That concerns health experts who point out that, when you're asking millions of people to roll up their sleeves and trust you, transparency is key.