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Humans have been obsessed with the measurement of time perhaps as far back as 100,000 years ago. Dr. Barth guides us through evidence of meas...

Stromatolite fossils are a dominant record of life for most of Earth’s history prior to the appearance of complex, multicellular organisms. S...

  Schedule Updated 9/21/2022 We are excited to announce the second Ariz...

In 2019, NASA announced that an international team had found sugars essential to life in meteorites. The discovery added to the growing list o...

Features 8x Magnification Waterproof Twist-up Eyecups 394ft field of view at 1000 yards Case, strap, lens covers and cleaning cloth Descriptio...

Features 10x Magnification Waterproof Twist-up Eyecups 325ft field of view at 1000 yards Case, strap, lens covers and cleaning cloth Specs ...

Features 10x Magnification Waterproof Twist-up Eyecups 325ft field of view at 1000 yards Case, strap, lens covers and cleaning cloth Specs ...

Aside from Earth, Mars is the most studied ecosystem by scientists today. With the process of collecting data from rovers and orbiting satelli...

Signed by the Author for Delivery at the Arizona Dark Sky Star Party The autobiography of Mike Weasner describes his journey through the Universe t...

This is part one of a two-part program on the Hubble Constant and the controversy about different values for this keystone unit of measurement. In...

This is part two of a two-part program on the Hubble Constant and the controversy about different values for this keystone unit of measurement. In...

Planetary nebulae are some of the most beautiful and intriguing deep sky objects in the Milky Way. They reveal the expanding, glowing shells of th...

Features Reflection / Transmission LED Illumination 3 Lenses: 4X / 10X / 40X Dust cover Included: Permanent slides, Slides, Microscopy instrument...

From its discovery in 1846 until Clyde Tombaugh's discovery of Pluto in 1930, Neptune was the farthest-known planet. Now with the controversial re...

Features 4K Wifi Waterproof Action Camera Waterproof Case Rechargeable Battery USB Cable Remote Handlebar/Pole Mount Frame Mount Straps Release B...

Gravity is the weakest of the four fundamental forces, it causes causes mutual attraction between all things with mass or energy. It is  approximat...

 The European Space Agency’s Exobiology on Mars (ExoMars) program has included a series of missions designed to study the potential for...

In cosmology, the anthropic principle involves any structure of the universe, the values of the constants of nature, or the laws of nature that ha...

Have you ever wondered how hard it can be to merge two black holes? Well it actually is a lot harder than you think. You would think that because t...

We hear the phrase "You can't prove that!" all the time. But is it a valid criticism? On this episode of How Do You Know Dr Daniel Barth will defi...

Description This device allows you to attach the Explore Scientific Hybrid 2N1 finder base to our Giant Binocular Series, allowing easy pointing/a...

Features Wide-view color VA display Moon phase display Barometer with weather forecast 6 kinds of dynamic weather forecast icons (Sunny, Clear to...

Features Binocular-style eyepiece design keeps both hands free for working on a specimen while observing Angled eyepiece barrels provide a comfor...