Largest Physics Survey Shows 68% of Physicists View Big Bang as Hot Dense State

The largest-ever survey of physicists found only 20% agreed that the Big Bang was the origin of time itself, according to results released on May 13, 2026. Semafor reported that 68% of those surveyed thought the Big Bang was just a hot, dense state. The findings highlight deep divisions among physicists on some of science’s most fundamental questions.

Physicists surveyed disagreed over whether Schrödinger’s cat would really be both alive and dead until observed. A plurality thought the cat would really be both alive and dead until the box is opened. They also disagreed over whether the universe is constantly splitting in two with observers only finding out which universe they are in upon measurement.

String theory emerged as the leading candidate among physicists surveyed for uniting relativity and quantum mechanics. Just 19% backed string theory. The survey results, released on May 13, 2026, capture the current state of thinking on these long-standing puzzles in physics.

Semafor reported the results in detail on the morning of May 13, 2026. Its findings underscore that even among experts there is no consensus on core interpretations of quantum mechanics or the nature of the Big Bang.

By contrast, the 68% who viewed it as a hot, dense state reflect a prevailing interpretation that stops short of declaring it the absolute beginning. The same poll showed a plurality endorsing the idea that Schrödinger’s cat exists in both states until observed.

Disagreement persisted on the many-worlds interpretation. Physicists surveyed split over whether the universe is constantly splitting in two and observers only discover their branch upon measurement. That division mirrors ongoing debates in quantum foundations that have persisted for decades.

Among proposals to reconcile relativity and quantum mechanics, string theory received the most support even if that backing remained limited. The 19% figure for string theory still placed it ahead of any rival approach in the survey. No other candidate came close in the polling of physicists.

The survey was conducted and released on May 13, 2026. Its scale sets it apart from previous efforts to gauge expert opinion in the field. Results show that popular accounts of major theories often diverge from what working physicists actually believe.