World Science: Call for proposals to help save Earth
* Call for proposals to help save Earth:
A group is offering grants to amateur and
professional astronomers to help find errant
* Lowly graphite stirs new excitement:
Graphite, the common material used in pencils, can
behave in surprising ways, researchers have found.
* Diet changes may not help fight cancer, studies
New research suggests healthy diets have limited
benefits in cancer treatment.
* Ancient "apartheid" leaves modern imprint:
Genetic evidence reveals a system of official
discrimination in ancient England, scientists
* Animals teach pups with surprising skill,
Meerkats instruct and encourage their young in
food-catching, according to a study.