In 1955, British researchers Louis Essen and Jack Parry used cesium-133 to make the first atomic clock. In their clock, cesium’s unpaired electron acts like a small magnet, interacting with the nucleus in a special way. […]
Lithium is located in the first column and second row of the periodic table. Its place on the table can tell us that although it has a low mass, it can carry large amounts of charge regardless. […]
When some metals, such as sodium, interact with water, they produce strong bases called alkalines. The term ‘alkali’ itself comes from an Arabic expression used to refer to wood ash heated without oxygen. […]
The first element to be discovered that belonged to the first column of the periodic table was hydrogen. But, there’s a massive gap between the date of hydrogen’s discovery and the discovery of other elements in the first column. […]
One problem regarding the research on the cosmic microwave background is the noise and interference emitting from various sources on Earth. The solution is to use space-based telescopes. […]
The notion of a cosmic microwave background was first proposed in 1946. Other predictions regarding the blackbody temperature of the modern universe were also made but it took a while for science to get ever closer to the truth. […]
If we were able to travel in time and decided to travel to the start of the universe, we wouldn’t be able to see anything. This is because the photons that existed at the time wouldn’t be able to travel anywhere. […]
Arno Penzias, Robert Wilson, and Karl Jansky, from 30 years prior, all experienced frustration from receiving background static while working with a cutting-edge radio antenna. […]
Hydrogen is the most abundant element in the universe. It makes up about 74% of all observable matter. Meanwhile, helium doesn’t combine chemically with other elements, making it truly scarce on Earth. […]
Hydrogen and Helium are the source materials for almost all other elements. Though they do share few similarities, they are quite different from each other in many aspects. […]
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