Interview with Dr. Lance Kriegsfeld
Hear Dr. Kriegsfeld discuss circadian rhythms and neuroendocrinology
Time Memory in Bees
Learn about landmark experiments that established internal clocks as the source of circadian rhythms in animals
Luciferase Reporters for Mammals in Circadian Research
Learn how luciferase reporters are used to study circadian rhythms in mammals
Mammalian Molecular Entrainment to Light and Networks
Learn how light information alters the molecular circadian clock to promote entrainment
Exploring Processes C and S Part 2: Forced Desynchrony
Learn how sleep researchers use a "forced desynchrony" protocol to separate effects of processes C and S on sleep
Common Clock Mechanism Graphics Tool
Use our free editable powerpoint file of mammalian, fly, and plant molecular clock mechanisms in presentations and papers
Bioluminescent and Fluorescent Reporters in Circadian Rhythm Studies
Read about the biology, application, and experimental design of fluorescent reporters in circadian studies
Circadian Clock-Controlled Genes Part 1
An introductory tutorial video on the mechanisms of mammalian molecular circadian clock regulation, and how the clock regulates other genes.
Fluence Response Curves and Action Spectra Series
Discover how action spectra are derived from fluence response curves
Interview with Dr. Carrie Partch
Hear Dr. Partch discuss the structural underpinnings of molecular clocks
Entrainment Simulator
Explore basic concepts of circadian entrainment, phase response curves, and phase shifts with our Entrainment Simulator
Human Circadian Variation: Genetic Approaches
Learn how genetic manipulations in model organisms and in vitro establish circadian links to human variation in chronotype
Phase Response Curves
Understand phase response curves, an important - but tricky! - circadian concept
The Suprachiasmatic Nucleus: Lesion & Transplant Experiments
Learn about landmark experiments that demonstrated the role of the suprachiasmatic nucleus (SCN) in circadian rhythms
Links Between Mood Disorders and Circadian Rhythms
Learn about the behavioral assays and gene manipulations used in rodent models to explore links between circadian rhythms and mood disorders
In-Lab Video Series: Rodent Wheel-Running Experiment
Learn how to design, perform, and analyze a rodent wheel-running experiment.
An Introduction to Chronobiology
Read our three-part introduction to basic concepts in chronobiology
Healthy Light Exposure Infographic
Learn the do's and don'ts of light exposure that affect circadian rhythms and sleep
The 2-Process Model of Sleep
Learn how a homeostatic drive and the circadian clock control the timing of sleep
Photoperiodic Flowering Part 1
Discover how plants measure night- and day-length to determine when to flower