The animation below illustrates how gravitational waves are emitted by two neutron stars as they first orbit each other and then coalesce. Though gravitational waves were predicted to exist in 1916, actual proof of their existence wouldn't arrive until 1974, 20 years after Einstein's death.
Uroabdomen can result from various causes, but the most common is related to trauma. Damage to the kidney, ureter, bladder, or urethra may cause urine to leak into the abdomen. Some common forms of trauma that can result in a disruption of the urinary tract in cats include:
If a person is leaking urine, they definitely need kegel exercises (pelvic floor strengthening). We have discussed this in the past in other blog posts, but this really is a very common misconception I often have to fight with my patients. Urinary incontinence is a failed system, not just a failed muscle.