Strange News: Building Material on Mars, Sharks and COVID-19, Crows Wage Unending War on Owls

Have scientists discovered a new building material for future Martian colonies? Why might a vaccine for COVID-19 lead to the deaths of thousands of deep-sea sharks? Is it true that crows can think about thinking (and are they really in an unending, existential war with owls)? All this and more in today's Strange News segment.
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