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Spaced repetition

Beat the
Forgetting Curve.

Memories decay rapidly if left alone. Knodes automatically calculates the perfect moment to review a topic. With each successful review, the memory becomes permanently locked in your brain.

Based on
Ebbinghaus's original research on memory and forgetting (1885).

Natural DecayYour Memory

Retention Health

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Want to learn an advanced topic but don't know where to start? Pick your destination. We instantly generate a personalized, linear journey map from the absolute basics straight to your goal.

Astrophysics

Destination

Black Holes (Lvl 3)

Black Holes (Lvl 3)
Relativity
Escape VelocityYou are here
Mass & Gravity

Biology

Destination

CRISPR Gene Editing

CRISPR Gene Editing
Restriction EnzymesYou are here
Transcription
DNA Structure

Computer Science

Destination

Neural Networks

Neural Networks
Backpropagation
Gradient DescentYou are here
Linear Algebra

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Explore topics

Bipolar neuron

A bipolar neuron is a nerve cell with two extensions that acts as a signal relay in sensory pathways such as the retina and olfactory system.

Retina bipolar cell

Retina bipolar cells relay signals from photoreceptors to retinal ganglion cells, splitting the visual stream into on-center and off-center channels.

Photoreceptor cell

Photoreceptor cells are specialized neurons in the retina that convert light into electrical signals; the two main types are rods and cones.

Inhibitory synapse

An inhibitory synapse reduces the likelihood that the postsynaptic neuron will fire an action potential, typically via GABA or glycine.

Special relativity

Special relativity is Einstein's theory relating space and time for observers in uniform motion, introducing time dilation and length contraction.