a result that threatened to upend two centuries of thinking in physics. Einstein’s theory, called general relativity, radically transformed the meaning of space and time. Rather than being fixed ...

However, the fundamental laws of physics, such as those of quantum mechanics, do not distinguish between the past and the future. They are symmetric with respect to time, meaning they work the same ...

According to animal advocacy group Shelter Animals Count, in 2023 more than 359,000 dogs and 330,000 cats were euthanized. A report published by the group at the midpoint of 2024 indicated 369,000 ...