Free Science Videos and Lectures

The video shows how each planet scales in size relative to each other.

The exploration begins at the smallest planet Mercury which has diameter of just 4880 km, then comes Mars (6794 km), Venus,...

This science video contains:
planets, stars, mercury, mars, venus, earth, neptune, saturn, jupiter, sun, sirius, pollux, arcturus, rigel, beteigeuze, antares, my cephei, vv cephei

Neutrophils are our body's first line of defense against bacterial infections.

These cells can recognize certain chemicals and move to the source of these "chemoattractants" by migrating up the...

This science video contains:
cell, neutrophil chemotaxis, bacteria, bacterium, defense

First the DNA Wrapping is animated.
The wrapping allows 6 feet of the long DNA molecule to be densely packed into the tiny nucleus of every cell. The process starts when DNA is wrapped around...

This science video contains:
molecules, dna, dna wrapping, dna replication, protein, histone, nucleus, nuclei zone, chromatin, chromosome, cell, double helix

Here is an experiment where sodium reacts with four different acids - 6M HCl, 12M HCl, 6M HNO3 and 15M HNO3.

The reaction with 15M HNO3 is the fastest and 12M HCl is the slowest reaction and it...

This science video contains:
experiment, reaction, sodium, HCl, HNO3, acid, fast, slow, hydrochloric acid, nitric acid

Dr. Quantum explains the importance of double slit experiment in physics.

If we randomly shoot small objects, say marbles, at the screen through a slit we see a pattern on the wall where they went...

This science video contains:
quantum physics, double slit, experiment, marbles, electrons, pattern, waves, interference, particles, superposition, matter, wave function