California Institute of Technology

Hushing the X chromosome

Early in the development of female embryos, a crucial event occurs in all cells: An X chromosome is silenced. Whereas males have only one X chromosome, females have two—which means they can have twice as many proteins generated ...

dateAug 08, 2016 in Biotechnology
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Chorus of black holes radiates X-rays

Supermassive black holes do not give off any of their own light, hence the word "black" in their name. However, many black holes pull in, or accrete, surrounding material, and emit powerful bursts of X-rays. Collectively, ...

dateJul 28, 2016 in Astronomy
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An up-close view of bacterial 'motors'

Bacteria are the most abundant form of life on Earth, and they are capable of living in diverse habitats ranging from the surface of rocks to the insides of our intestines. Over millennia, these adaptable little organisms ...

dateMar 29, 2016 in Cell & Microbiology
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