In fact, the photons in the cosmic microwave background have travelled a cool 45 billion light years to get here. That makes the visible universe some 90 billion light years across. Thatâs big but the universe is almost certainly much bigger. The question than many cosmologists have pondered is how much bigger. Today we have an answer thanks to some interesting statistical analysis by Mihran Vardanyan at the University of Oxford and a couple of buddies.
Heart conditions, such as angina, pericarditis, or heart attack, are common causes of a burning sensation in the chest. Other causes include pulmonary embolism (blockage in a blood vessel in the lungs) that reduces blood flow to the lungs and leads to chest burning and pain. Pleurisy (inflammation of the lining around the lungs) may also cause a burning sensation in the chest. Heartburn can lead to chest burning sensation, especially in severe cases, such as gastroesophageal reflux disease (GERD). Less often, chest burning is a symptom of asthma or anxiety attacks. It is also possible to experience chest burning as a result of rib fractures or any other trauma experienced in the chest area.
Sometimes chest pain may result from overuse or an injury to the chest area from a fall or accident. Viruses can also cause pain in the chest area. Other causes of chest pain include: