Scholars show how multiple planet movements tie into the 819-day Mayan calendar. The 819 days of the calendar must be viewed across a 45-year time period to fully understand. The movements of all ...

When the earliest stargazers gazed skyward, they carefully mapped the positions of the stars, and they recognized them as fixed and immovable objects. Some of the heavenly lights, however, were not so ...

In the beginning, when planets were newborn, they glowed like furnaces, vast oceans of molten rock wrapped in heavy blankets of gas. For a long time, scientists believed those fiery worlds were too ...