Great Big Story
The monument to the battle of the nations, a European giant
Explore the history and grandeur of Leipzig's monument commemorating the pivotal 1813 battle against Napoleon.
Curated Video
Lactic Acid: A Case Study in Chirality
Lactic acid (2-hydroxypropanoic acid) is a classic example of a chiral molecule. It contains a chiral center at the second carbon atom, bonded to a hydroxyl group (-OH), a hydrogen atom, a carboxyl group (-COOH), and a methyl group...
Curated Video
Symmetry and Optical Activity: Do Your Molecules Have It?
Symmetry and optical activity are intricately linked in organic molecules. A molecule is optically active if it can rotate the plane of polarized light. Optical activity arises from the molecule’s lack of symmetry—specifically, its...
Curated Video
Conditions for Optical Activity: When Molecules Twist Light
For a molecule to exhibit optical activity, it must be chiral, meaning it has no internal plane of symmetry. Additionally, the solution or compound should not contain equal amounts of enantiomers (racemic mixture), as these cancel out...
Curated Video
Chirality in Organic Compounds: Asymmetry in Action
Chirality refers to molecules that have a non-superimposable mirror image due to an asymmetric carbon atom. These chiral compounds are vital in many biological systems, as their mirror images often have different effects
Curated Video
Conformational Isomerism: Rotations that Change Everything
Conformational isomerism arises due to the rotation around single bonds (sigma bonds) within a molecule. Unlike other types of isomerism, conformational isomers, or conformers, can interconvert without breaking bonds. For example, in...
Curated Video
Rules for Writing Resonating Structures: Get Them Right!
When writing resonance structures, it's essential to follow certain rules: only electrons move, not atoms; all structures must have valid bonding; and charges should be minimized. These guidelines ensure resonance structures accurately...
Curated Video
Conditions for Resonance: Why Acetamide and Carbonate Matter
Resonance requires specific conditions for electron delocalization. The molecule must have a conjugated system with alternating single and double bonds, and atoms must be capable of sharing electrons. Acetamide and the carbonate ion are...
Curated Video
Resonance in Chemistry: The Dance of Electrons
Resonance is a concept used to describe delocalization of electrons in a molecule across multiple atoms. In resonance structures, electrons are shared between atoms in ways that stabilize the molecule. This "electron dance" can lower the...
Curated Video
Rosalind Franklin for Kids | Bedtime History
Explore the remarkable life and contributions of Rosalind Franklin, a pioneering scientist whose work was crucial in the discovery of DNA's double helix structure. Born in 1920 in London, Franklin was a brilliant chemist and X-ray...
Wonderscape
How Was Stonehenge Built? Unraveling the Ancient Techniques
Delve into the mysteries of how Stonehenge was constructed over 1,500 years by Neolithic builders. Learn about the possible methods used to transport massive bluestones over 180 miles, shape the sarsen stones, and assemble the iconic...
Curated Video
Living Things: Human Respiratory System
By the end of this learning object, the student will be able to: Summarize the main points on the human respiratory system.13553
Curated Video
Matter and its Construction: Elements consist of Similar Atoms
By the end of this learning object, the student will be able to: Introduce the elements in nature.41826
Curated Video
Matter and its Construction: Atomic Structure of Matter
By the end of this learning object, the student will be able to: Distribute the electrons in energy levels40991
Communication Coach Alex Lyon
How to Speak Clearly and Confidently with Logical Main Points
Learn How to Communicate Clearly and Confidently with Logical Main Points.
Wonderscape
The Structure and Role of the Judicial Branch
Explore the structure of the judicial branch, which consists of three levels of federal courts: district courts, circuit courts, and the Supreme Court. Learn how the judicial branch clarifies the laws of the United States and handles...
Curated Video
Why Do We Remember Bad Memories More than Good Memories?
Negative events tend to induce stress, prompting our body to release the stress hormones epinephrine and cortisol. These hormones are believed to influence the basolateral amygdala (BLA), which is responsible for storing fear-conditioned...
Curated Video
Do Jellyfish Have Eyes?
Jellyfish have eyes, but unlike humans, their eyes are not concentrated in a single organ. Instead, the ability to see is facilitated by a network of nerves and proteins called opsins. The jellyfish's light-sensing organ lies within a...
Weird History
Unusual Facts About Well-Known Cities
There are certain cities throughout the world that we all know the names of: Paris, Tokyo, New York, Moscow. We likely know one or two things about each of these cities. Paris has the Eiffel Tower. New York has Broadway. But each city...
Wonderscape
Roman Architecture: Innovations and Influence
Discover the ingenuity of ancient Roman architecture, from the use of arches and vaults to the groundbreaking application of concrete. Explore iconic structures like the Pantheon and Colosseum, and see how Roman design principles...
Wonderscape
Differences Between Plant and Animal Cells
Explore the unique features of plant cells compared to animal cells. Learn about the specialized structures such as vacuoles, cell walls, and chloroplasts that distinguish plant cells. Understand how these features contribute to the...
Wonderscape
The Importance of Cells in Living Organisms
Explore the significance of cells, the smallest living units in all organisms, in maintaining life. Understand how cells provide structure, convert nutrients into energy, carry out specialized functions, and contain hereditary material....
Wonderscape
Understanding US State Government Structure
Gain insight into the structure of state governments, including their resemblance to the federal system and the roles of the executive, legislative, and judicial branches. Learn about the significance of state constitutions in organizing...
Curated Video
The Eiffel Tower
The Eiffel Tower, completed in 1889, is not only the symbol of Paris but also a remarkable engineering marvel. Standing at 324 meters tall, it remains the city's tallest structure and has attracted over 200 million visitors.