NASA has announced the results of an epic physics experiment which confirms the reality of a space-time vortex around our planet.

Experimenting with the physics of water in the weightless environment aboard the International Space Station. For more out of this world experiments please check out
physics central.

From 250 miles above the Earth, Expedition 63 is very much aware of the hard times which exist in the neighborhoods of the world rotating below. Even amid the uncertainty and difficulties of battling through these challenging times, we encourage everyone to be the best “crewmates” & take care of each other. Cherish the people you love.

-Commander Chris Cassidy

After a seven-month journey, NASA’s Perseverance Rover successfully touched down on Mars on February 18, 2021. In this video, mission controllers at NASA's Jet Propulsion Laboratory in California celebrate landing NASA's fifth rover on Mars.

Sigrid introduces her series on English pronunciation and tells us why there isn't always just one "right" way to pronounce words.

Sigrid uses common household objects to explain two ways to pronounce the letter A.

Sigrid explains a third way to pronounce the letter "A." For the first two ways, see Sigrid explains: the letter A - Part 1 of 4.

Sigrid explains that "A" is also a very important one-letter word.

We're finally at the end of the letter "A." Sigrid talks about the unstressed sound of "A" in words, and gives us some examples. For other pronunciations, see parts 1, 2, and 3.

Sigrid looks at the letter "B" as followed by either a vowel or a consonant, and the sound of the double "B" as well.

Sigrid finishes telling us about pronouncing the letter "B." Here's part 1 in case you missed it.

Sigrid explains about the "hard" and "soft" sounds for the letter "C."

"D" is a voiced consonant that sounds a bit different depending on its context in a word or sentence.

Sigrid explains various sounds associated with the letter "E."

Let's learn about pronouncing the letter "F" in various contexts.