Mercury, Venus, and Mars are all super low on water – so where did ours come from and why do we have so much of it? We think our water came from a few unlikely sources: meteorites, space dust, and even the sun.

How is it possible to have cataclysmic eruptions without any real cataclysm?

Sponges might not look like particularly complex animals, but they've had billions of years to evolve their own special systems. And one of those systems might involve sending messages through their body in the form of light.

Hank describes how non-Newtonian fluids can save lives - and dreams of a bulletproof hoodie.

Hosted by: Hank Green

Gems are more than just pretty rocks! Hosted by: Michael Aranda

Astronomers have thought for years that Earth was dry in the beginning, but a new paper suggests that Earth might have actually started out wet! And In other meteorite news, a new study of impact sites might give us new clues about...

Rocks or mineral crystals can often remind us of other things in our daily lives, but coming across some of THESE rocks might be one of the creepiest experiences a rockhound can have!

You look really pretty, but what are you actually putting all over your face?

Hank describes how non-Newtonian fluids can save lives - and dreams of a bulletproof hoodie.

As CEO of the Global Fund for Women, Musimbi Kanyoro works to support women and their ideas so they can expand and grow. She introduces us to the Maragoli concept of "isirika" -- a pragmatic way of life that embraces the mutual...

When it comes to sparkly objects, the planet Earth has a lot to offer. Here are 5 especially awesome glasses made by nature!

cha
pters

OBSIDI
AN

0:57/> 2 OPALr/> 4
:09
3
TEKTITE
S
...

In this episode, we talk about Silicon Valley's namesake and how network solids are at the heart of it all. Hank also discusses Solid-State Semiconductors, N-Type and P-Type Semiconductors, Diodes, Transistors, Computer Chips,...

Hank describes three of the whackest weather phenomena on Earth: atmospheric rivers, fire tornadoes, and ball lightning. Super interesting and super weird.

Gems are more than just pretty rocks!

Is Glass a Liquid?

Howcast - Make any occasion more festive with your own homemade confetti.

Silicon compounds | Silicates , earth crust |Natural occurance | Silica SiO2 | Polymorphism | Quartz | Japer |Onyz | Kieselguhr | Diatoms in sea |SiO2 preparation | oxidation of silica | orthosilisic acid Silicates,...

Properties of silica | Silicon -Oxygen bond | SiF4, H2SiF6 | Silicon carbide SiC| Hardest substance | piezo-electric effect|Applications of quartz ; Silica, or silicon dioxide (SiO2), is a hard, white, and translucent material...

Aerogels are the world's lightest (least dense) solids. They are also excellent thermal insulators and have been used in numerous Mars missions and the Stardust comet particle-return mission. The focus of this video is silica aerogels,...

Structure of silica | SiO4 anion unit | Silicon to oxygen ratio in silica 1 :2 | Silica SiO2 ; Silica (SiO2) is a compound with the chemical formula SiO2, based on SiO4 tetrahedra, where each silicon atom is bonded to four oxygen...

A flexible or rigid boundary protecting a cell, outside the cell membrane.
<

br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

A substance in which a large number of non-metal atoms are covalently bonded in a continuous network.
<

br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and...

We use glass every day, but how is is made?
<

br/>

Material processes - Changing materials - More chem
i

cal reactions />

Learning Points
An endoth
e

rmic reaction absorbs heat energy.
...