What if the Earth's star was two stars? Like, the kind that orbits each other. If there were that in the middle of the solar system, what would conditions on Earth be like? Would life as we know it be able to exist?
I think it would depend on the type of stars. If you're thinking what if two of our sized stars orbited each other at the center of our solar system, then I would think that the "Goldilocks Zone" that makes conditions for life as we know it possible, would be pushed further out. If Earth's orbit were pushed out as well, then I think it's a good possibility that life as we know it (assuming nothing else changed) would still exist.
Currently 4383 exoplanets are reported. 439 are reported with 2-4 host stars, multiple star systems, 384 are in binary systems. 55 Cnc is a good place to start as a binary system reporting 5 exoplanets orbiting there. However, stars with the largest number of exoplanets orbiting like 7 or 8 are single host star systems reported. Example, TRAPPIST-1, KOI-351, Kepler-90 i. The total number of binary star systems reported in the exoplanet site is 288 that have exoplanets.