Scientists have effectively isolated human muscle stem cells, revealing that the cells could robustly duplicate and fix impaired muscles when attached onto an injured location, according to a new paper published in Stem Cell Reports.
The Whirlpool Galaxy, a classic spiral galaxy, is pictured in this NASA handout photo. At only 30 million light years distant and fully 60 thousand light years across, also known as NGC is one of the brightest and most picturesque galaxies on the sky.
All Of Earth's Water In A Single Sphere This picture shows the size of a sphere that would contain all of Earth's water in comparison to the size of the Earth. The diameter would be roughly the distance from Salt Lake City, Utah to Topeka, Kansas.
Collision Between Two Planetary Bodies. A similar crash likely formed the Earth and the Moon some billion years ago. The newly formed Earth may have taken most of the water and other volatiles remaining after the collision.
About a billion years after the Big Bang, the universe began to heat up for a second time and hydrogen became ionized. But what was responsible for this transformation that was critical to understanding the universe as it is today?