The conduits, which are spooled in big stacks on a boat before being buried in an underwater trench, are a crucial part of the grid as demand for electricity increases. Credit...Video by Juho Kuva ...

If you think you’ve spotted more than the usual number of blinking bugs this year, you’re not alone. But experts say many firefly species are at risk of extinction. By Nazaneen Ghaffar Nazaneen ...