Bacterial drug resistance studied by robotic E. coli evolution


Experimentally evolving E. coli under pressure from a large number of antibiotics was able to identify constraints underlying evolved drug resistance.

Finding real rewards in a virtual world


A new study shows that mice who learn to find goals in virtual reality use their hippocampus the same was as in the real world.

The brain’s GPS has a buddy system


In addition to encoding self location, brain cells in the rat hippocampus act like a GPS that encodes the location of other rats.

Deep-brain exploration with nanomaterials


A new way to optogenetically activate neurons deep in the brain using infrared light and upconversion nanoparticles. It’s non-invasive!

Root growth improved in soil contaminated with cesium


Overactivating the ABA signaling pathway in plants prevented cesium in soil from blocking root growth in plants.

Random movements help color-detecting cells form the proper pattern


Scientists have used a mathematical model to explain why zebrafish cone cells in the eye are arranged in a specific pattern in all individuals.

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Dec

21

The stars align

The stars align


The stars align. That’s what you say, when things work out perfectly. In the case of an eclipse, of course, it’s not stars that align but rather the moon and sun.

The free-energy principle explains neural network behavior


Scientists show that the free-energy principle can explain how neural networks work.

Smarter AI: machine learning without negative data


Scientists have developed a new method for machine learning that allows an AI to make better classifications without negative data.

Stem cell exhaustion and proliferation: An aging fly’s tale


Blocking the gene ced-6 led to stem cell exhaustion in aging fruit flies and prevented repair of damaged intestines.

Purple biomass makes a good crop fertilizer


Biomass made from purple marine bacteria provides more than enough nitrogen to plants without harming the environment

A new and improved way to store hydrogen


A simple chemical reaction allows hydrogen-carrying ammonia to be stored and retrieved cheaply and easily.

Social contact-seeking behavior and loneliness in the brain


Levels of the peptide amylin in the brain are related to loneliness; activating amylin neurons in the MPOA drives isolated mice to seek social contact.

New lab-grown retinal sheets almost ready for clinical trials


A new retinal transplant technique works by preventing bipolar cells from maturing in lab-grown retinal sheets.

Introducing Nikola, the emotional android boy


A new android named Nikola will help researchers study facial expressions, emotions, and social interactions.

Transgenic plants ??on acid survive without water


Scientists designed transgenic plants that survive drought-like conditions by bumping up acetic acid production only when water is scarce.

Artificial gravity protects the immune system of mice in space


Mice who experienced artificial gravity on the ISS suffered less damage to their immune system (thymus) than weightless mice did.