Scientists have recently detected a pattern of strange signals in the sky above Antarctica. It defies current physics models and could represent a new particle, scientists told Space.com.Discovered by the Antarctic Impulsive Transient Antenna (ANITA) experiment,

WASHINGTON (Reuters) -The universe has two kinds of matter. There is invisible dark matter, known only because of its gravitational effects on a grand scale. Scientists estimate that ordinary matter makes up only about 15% of all matter, but have long struggled to document where all of it is located, with about half unaccounted for.