Some of the green tails in my city have signs saying bikes are allowed (words, not symbols). They don't say walking is allowed, so are they bike only? I know that all the trails allow bikes, so I find these signs confusing.All the trails have the NO signs; no motor vehicles. But people ride e-bikes and scooters on them. Don't electric motors count as motors? Am I over thinking again?
Dark energy is used to explain the rate of expansion of the observable universe. Dark matter is used to explain observed anomalies in the rotations in some galaxies. For general relativity and Newtonian gravity math to work, there has to be something we can’t observe. Einstein had added a cosmological constant to relativity, that he later called his biggest mistake, but turned out to be very useful.
If the crime results in life in prison or the death penalty maybe.