Detectable Civilizations in our Galaxy 1 A framework for thinking about how many detectable ...
Detectable Civilizations in our Galaxy 2 Why do we even care about the Drake Equation. ...
Detectable Civilizations in our Galaxy 3 Reconciling with the traditional Drake Equation
Detectable Civilizations in our Galaxy 4 Taking a shot at estimating the number of detectable ...
Detectable Civilizations in our Galaxy 5 More reasons why we haven't detected anything yet.
Human Evolution Overview From the extinction of the dinosaurs to humanity
Understanding Calendar Notation Difference between BC, BCE, AD and CE. A little bit about ...
Correction Calendar Notation Correcting the time difference calculation by taking into ...
Development of Agriculture and Writing The Paleolithic and Neolithic eras of the Stone Age.
Introduction to Light Light and electromagnetic radiation
Seasons Aren't Dictated by Closeness to Sun Why our closeness to the sun does not dictate the ...
How Earth's Tilt Causes Seasons How being Earth's tilt causes seasons
Milankovitch Cycles Precession and Obliquity How changes in Earth's rotation can effect ...
Are Southern Hemisphere Seasons More Severe? Are Southern Hemisphere seasons more severe ...
Precession Causing Perihelion to Happen Later Clarifying the effect of axial precession on ...
What Causes Precession and Other Orbital Changes What causes precession and other orbital changes
Apsidal Precession (Perihelion Precession) and Milankovitch Cycles Apsidal Precession ...
Firestick Farming How the indigenous Australians used fire to change their environment
Carbon 14 Dating 1 Carbon 14 Dating 1
Carbon 14 Dating 2 Carbon 14 Dating 2
Potassium-Argon (K-Ar) Dating How K-Ar dating can be used to date very old volcanic rock and ...
K-Ar Dating Calculation Working through a calculation for K-Ar dating (good to have some ...
Chronometric Revolution Discussion of the relatively recent changes in our ability as a ...
Collective Learning How symbolic language drives collective learning and how this is one of ...