Daily Archives: April 12, 2012

How sperm and eggs develop precisely 23 chromosomes each

Researchers at the University of California, Davis have discovered a key tool that helps sperm and eggs develop exactly 23 chromosomes each. The work, which could lead to insights into fertility, spontaneous miscarriages, cancer and developmental disorders, is published April 13 in the journal Cell. Healthy humans have 46 chromosomes, 23 from the sperm and 23 from the egg. An embryo with the wrong number of chromosomes is usually miscarried, or develops disorders such as Down’s syndrome, which is caused … Continue reading

Posted in Biology | Leave a comment

No big tsunami this week – thankfully

earthquake

The magnitude 8.6 earthquake that struck North Sumatra, Indonesia, at 2:38 p.m. local time yesterday did not lead to a tsunami comparable to Indonesia’s 2004 disaster for a couple of reasons. The magnitude 9.1 earthquake that struck in 2004 and triggered a tsunami that killed more than 200,000 people in 14 countries was a subduction megathrust earthquake closer to shore (250 kilometers south-southeast of Banda Aceh). A megathrust earthquake is also the same type of earthquake that struck off Japan in … Continue reading

Posted in Geology | Leave a comment

H3+: The molecule that made the Universe

In a study that pushed quantum mechanical theory and research capabilities to the limit, University of Arizona researchers have found a way to see the molecule that likely made the universe – or at least the hot and fiery bits of it. Lurking in the vast, chilly regions between stars, the unassuming molecule known as a triatomic hydrogen ion, or H3+, may hold secrets of the formation of the first stars after the Big Bang. At the University of Arizona, then … Continue reading

Posted in Cosmology | Leave a comment