Thursday, April 24 2014

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Science News Articles for Thursday, April 24 2014
Science News
Asteroids hit Earth with force of nuclear blasts

Findings released for the first time by the Nuclear Test Ban Treaty Organization — which operates a network of sensors that monitors Earth around the clock, listening for the infrasound signature of nuclear detonations — confirmed that between 2000 and 2013, 26 explosions on Earth's atmosphere were detected, ranging in energy from 1,600 kilotons — all caused by asteroid impacts.

Researchers See New Importance in Y Chromosome

There is new reason to respect the diminutive male Y chromosome. Besides its long-known role of reversing the default state of being female, the Y chromosome includes genes required for the general operation of the genome, according to two new surveys of its evolutionary history. These genes may represent a fundamental difference in how the cells in men’s and women’s bodies read off the information in their genomes.

Scientists solve 'bio-duck' ocean sound mystery: Antarctic Minke whales

A strange noise, sounding much like a duck, has been heard in waters surrounding Antarctica for decades. The sounds have also been recorded in the waters off Western Australia and the Eastern Weddell Sea off Antarctica.