Measure and monitor HHMI’s institutional greenhouse gas emissions at the two campuses we operate and look for strategies on greenhouse gas reduction at both campuses. Harness the tremendous community ...

What am I looking at? These images are a series of 1-millimeter-thick slices from front to back through the brain of a mouse, with ChAT neurons (1) in purple and pyramidal neurons (2) in green. The ...

During pregnancy and breastfeeding, milk-producing cells that surround the branching network of ducts in the breast swell to form spherical groups called alveoli. These alveoli are where milk is ...

This vivid chameleon embryo has been stained to highlight the bones and cartilage of its skeleton. You can also see some of its developing internal organs. This vivid chameleon embryo has been stained ...

What am I looking at? This is an image of a fluorescently labeled fruit fly ovary, composed of multiple ovariole strands, each containing multiple developing egg chambers. The eggs are dark ...

Obviously, the beard on this lizard is not like the beard that a human can grow. However, the spiked scales around its neck and face look similar enough to a human beard that this creature is commonly ...

Pyramidal neurons are a very common type of neuron in the brain. Their cell bodies have a unique pyramidal shape that is the source of their name. They make up about two-thirds of all neurons in the ...

This video presents a progressive rainbow of neurons in the brain of a fruit fly – but this is just a small sampling of the more than 135,000 neurons in a typical fruit fly’s brain. This video ...

Confetti mice are very useful in research because they allow scientists to track which cells produce which proteins based on their color under a fluorescent microscope. These mice are particularly ...

The ER is the protein synthesis and processing center of a cell and is also responsible for the synthesis of some lipids. There are two types of ER in a cell – rough ER and smooth ER – that together ...

Love them or hate them, snakes are biologically fascinating. This image shows the skeleton of a corn snake. Its flexible spine and jaws allow it to eat animals like mice and rats that you would never ...

Every process has a beginning and end, but sometimes the middle segment is the most interesting. This is an image of a neural stem cell in the midst of the process of differentiating into a neuron. In ...