In many US school systems, when administrators need to cut staff, they must use seniority firing the "last in, first out" system of job security.
It could mean that poorer teachers can stay while better ones with less time in the system must leave.
Harlem Children's Zone President Geoffrey Canada says it's this practice that should be let go.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.
Confused Apple customers are finding coins in their MacBooks.
High levels of iron help prevent hearing loss, a study has claimed.
A software engineer has constructed a fingernail-sized engine made of paper and it totally works!
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