Using LEDs as Light Sensors

Using LEDs as Light Sensors

In my previous article DC Versus AC I discussed how a diode can be used as a rectifier to convert alternating current (AC) into direct current (DC) because the diode allows current to flow in one…
Dismantling Pancreas Cancer's Armor

Dismantling Pancreas Cancer's Armor

SEATTLE – Pancreas cancer is notoriously impervious to treatment and resists both chemotherapy and radiotherapy. It has also been thought to provide few targets for immune cells, allowing tumors to…
RXTE Reveals The Cloudy Cores Of Active Galaxies

RXTE Reveals The Cloudy Cores Of Active Galaxies

Picture a single cloud large enough to span the solar system from the sun to beyond Pluto's orbit. Now imagine many such clouds orbiting in a vast ring at the heart of a distant galaxy, occasionally…
NuSTAR Helps Untangle How Stars Explode

NuSTAR Helps Untangle How Stars Explode

For the first time, an international team of astrophysicists, including Lawrence Livermore National Laboratory scientists, have unraveled how stars blow up in supernova explosions. Using NASA's…
Forest Model Predicts Canopy Competition

Forest Model Predicts Canopy Competition

PROVIDENCE, R.I. [Brown University] — Out of an effort to account for what seemed in airborne images to be unusually large tree growth in a Hawaiian forest, scientists at Brown University and the…
Fibonacci and the problem with breeding rabbits

Fibonacci and the problem with breeding rabbits

In the early part of the 13th (XIII) century, Europe was still using Roman numerals. You can imagine what that did to advance math education. Fibonacci is famous for the number sequence that bears…
Fibonacci and the problem with breeding rabbits

Fibonacci and the problem with breeding rabbits

In the early part of the 13th (XIII) century, Europe was still using Roman numerals. You can imagine what that did to advance math education. Fibonacci is famous for the number sequence that bears…
The Science Way To Reduce Animal Testing In Science

The Science Way To Reduce Animal Testing In Science

By growing “mini-livers” from adult mouse stem cells, the road may be paved to replacing, reducing or refining the use of animals in science. Dr. Meritxell Huch from the Gurdon Institute at Cambridge…