Learn about the states of matter, solids, liquids and gases, how they're different and where they're found in everyday life.

We all know that whales are endangered due to hunting and pollution, but do you know how important they are for the ocean and the environment? This video shows how essential a healthy population of whales is to the ocean ecosystem. Creative Commons Attribution license (reuse allowed). Video was not modified. Please visit sustainablehuman.org for credits and more information.

Sigrid talks about some of the ways she learned how to speak Italian and French.

David and Ben Crystal explain what goes into original pronunciation (OP) productions of Shakespeare and what they reveal about the history of the English language.

With the Rainforest Alliance certification, everyday purchases can help prevent deforestation and climate change, protect wildlife, alleviate poverty and transform business practices. Choose products with the seal of the green frog when purchasing coffee, cocoa, tea, flowers, fruit, paper, and wood products.

Have you ever wondered why English seems to have roots in so many different languages? Here is a look at what words the Anglo-Saxons and Vikings brought to the English language.

Here is a short animated video about the importance of fisheries for food security, health and growth in developing countries, highlighting the commitment of the EU to helping promote sustainable management of seafood resources and inclusive opportunities for trade and growth.

The cover letter is an essential document when submitting a job application. Here you can learn about what function a cover letter should serve.

Sigrid describes her time in Basel, and how she ended up visiting France and Italy as well.

When we look at insults used in Shakespeare's play "Romeo and Juliet," we get a new insight into dynamics between the characters and how they relate to the development of the story.

This video takes a look at hydrothermal vents and the novel life forms that thrive there in the absence of sunlight, fueled by underwater volcanoes. One of these harsh environments is the Axial Seamount off the West Coast of the United States.

The First Lady welcomes the first act in an evening of poetry, music and spoken word at the White House. Pianist ELEW and bassist/singer Esperanza Spalding kick off the evening with an instrumental jazz fusion performance. Enjoy!

Lifestyle video blogger Aspyn Ovard demonstrates how she packed her suitcase efficiently for a recent trip to the Bahamas.

Sigrid begins her tale of how she ended up in Italy, where she's now living. She was born in Minneapolis and raised in New York. As a young adult, she relocated to Switzerland in order to study early music. In this video, she talks about traveling to Europe for the first time and learning about the different genres of music prior to the classical era.

The President and First Lady kick off an evening of poetry, music, and the spoken word at the White House.