Acronyms

Find and compare acronyms based on definition, organization, and type.

Chemical Elements

Find and compare chemical elements on the periodic table by atomic weight, family, discovery date, properties, and more.

Comets & Asteroids

Find and compare asteroids, comets, and other celestial objects by their full name, proximity to Earth, IAU name, orbital period, and more. Data from the U.S. National Aeronautics and Space Administration (NASA).

Constants

Find and compare CODATA recommended values of the world's fundamental physical constants by value, uncertainty, unit, and category. Data from the U.S. National Institute of Standards and Technology (NIST).

Dinosaurs

Find and compare dinosaurs based on their size, time period of existence, diet, native region, and more.

Earthquakes

Find and compare significant or major earthquakes by year, magnitude, deaths, injuries, damages, and more. Data from the U.S. National Geophysical Data Center (NGDC).

Endangered & Threatened Species

Find and compare endangered and threatened species based on the species type, endangered status, group, and location. Data from the U.S. Fish and Wildlife Service (FWS).

Fallacies

Find and compare common fallacies and their type, subtype, name, definition, explanation, and more.

Growth Chart

Find and compare heights based on gender and age. Data from the U.S. Centers for Disease Control and Prevention (CDC).

Highest Mountains

Find and compare the highest mountains by location, death rate, height, difficulty of ascent, expedition length, and more. Data from Jagged-Globe.

Inventors

Find and compare inventions and inventors from around the globe by field of study, country, date of patent issuance, patent number, and more. Data from the U.S. Patent and Trademark Office (USPTO).

Nobel Prize Winners

Find and compare Nobel Prize winners by their university, field(s) of study, religion, subject, nationality, and more. Data from Nobelprize.org

Paradoxes

Find and compare common paradoxes by their type, subtype, explanation and more.

Planets

Find and compare planets in the solar system based on size, distance from the sun, surface temperature, and more. Data from U.S. National Aeronautics and Space Administration (NASA).

Population Growth

Find and compare population growth rates by country, year, age group, population size, and more. Data from the U.S. Census Bureau.

Product Recalls

Find and compare product recalls and the product's category, manufacturer, recall information, and more. Data from ConsumerBell.

Tallest Buildings

Find and compare the tallest buildings by building height, building cost, building floor count, construction time, location, and more.

Time Spent

Find and compare time spent by activity, time spent doing the activity, and gender. Data from the U.S. Bureau of Labor Statistics

Tsunamis

Find and compare tsunamis that have occurred around the world based on their location, date, intensity, and death tolls.

U.S. Hurricanes

Find and compare U.S. hurricanes by category, state, year, max wind speeds, and more. Data from the U.S. National Oceanic and Atmospheric Administration (NOAA).

Volcanic Eruptions

Find and compare worldwide volcanic eruptions based on year, location, volcano type, financial cost, and fatalities. Data from the U.S. National Geophysical Data Center (NGDC).

Wildland Fires

Find and compare US annual wildfire statistics by total acres burned, number of fires, and average acres burned per fire. Data from the U.S. National Interagency Fire Center (NIFC)

World Factbook

Find and compare countries from the CIA World Factbook by year, GDP, total area, life expectancy, inflation rate, GDP growth rate and more. Data from the U.S. Central Intelligence Agency (CIA).