Dwarf galaxies need dark matter too

Stars in dwarf spheroidal galaxies behave in a way that suggests the galaxies are utterly dominated by dark matter, University of Michigan astronomers have found.

Humans and monkeys share Machiavellian intelligence

When it comes to their social behavior, people sometimes act like monkeys, or more specifically, like rhesus macaques, a type of monkey that shares with humans strong tendencies for nepotism and political maneuvering, according ...

Discovery Crew Completes Heat Shield Inspection

The STS-120 crew members completed the day's scheduled inspections of Space Shuttle Discovery’s heat shield before noon EDT. They used Discovery’s robotic arm and an attached boom extension to check the spacecraft’s ...

Adult stem cells lack key regulator

The protein Oct4 plays a major role in embryonic stem cells, acting as a master regulator of the genes that keep the cells in an undifferentiated state. Unsurprisingly, researchers studying adult stem cells have long suspected ...

Gulf of Mexico dead zone to be studied by marine scientists

University of Texas at Austin marine scientists have been awarded $781,000 by the National Oceanic and Atmospheric Association (NOAA) to better understand how nutrient pollution from the Mississippi River affects the large ...

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