When I asked readers on social media for suggestions about the coolest things they’ve seen in spaceflight during the last 25 ...

These mines put holes in ships’ bottoms, which causes serious flooding that often sinks them ... Some Russian floating mines had to be removed from the Black Sea in 2022 and 2023 so that Ukrainian ...

Black carbon, a byproduct, is especially concerning ... These use metals and composite materials, adding to emissions.