A pedigree shows how a trait is inherited over several generations. This video/slideshow explains why pedigrees are important, and the key factors scientists consider when studying pedigrees. [24:30]

Water is unique among all liquids. In the following video David Caprette, PhD, discusses its remarkable properties and describes experiments to conduct with this common, crucial substance. [29:36]

In the following video, Evan Seimann, PhD, defines key terms and concepts of ecology, basic characteristics of populations, population age structures and densities, and explains the dynamics of growth models within a population. [22:59]

In this video David Caprette, PhD, discusses the types and properties of mixtures prepared and/or encountered in a biological laboratory. He also introduces basic lab equipment, terms and concepts related to formulas, and the concept of the mole. [33:24]

Earth's crust is altered by two closely related dynamic processes: the rock cycle and plate tectonics. In combination, these processes continually recycle and remodel Earth's solid surface, and reshape its oceans and rivers. [37:53]

Charles A. Czeisler, MD, PhD, explains the body’s "internal clock," how sleep patterns are impacted by spaceflight and microgravity, and strategies to counteract these impacts.

The following video provides an overview of the parts and use of a micropipettor. [11:18]