David Forester

@arborscientiae.bsky.social

321 Followers 209 Following

I teach astronomy, biology, and chemistry, and I coach esports. Hobbies include hiking, biking, climbing, drumming, gaming, and photography.

A mottled gray rock with various intrusions and inclusions, some of which did not erode as much and are protruding. A green bush sits in the background.
View from the top of a parking garage looking down onto the launch site for the 4th of July fireworks at Legoland California.
Screenshot of a perfect score for the June 26th 4x3 game made by Hank Green. The background is gold, all the anchor words were chosen first, and the categories are otherwise in reverse rainbow order. The game was solved in under 90 seconds earning that additional bonus as well.
Score screen for the June 24th 4x3 game. Blue and purple got swapped, otherwise it would have been a perfect game.
"The Keyhole" part way up Long's Peak, to the left you can see a storm shelter made of nearby stones where people can hunker down in dangerous weather. The keyhole is an opening in a natural stone wall that you must climb through to get to the other side and take the safest path to the summit.
Aragorn, from the Lord of the Rings: Return of the King, after he has been crowned king of Gondor. A man with long brown hair and a beard is wearing a metal crown that matches his plate and chainmail armor. Behind him is bass relief artwork on a stone wall.
The trail of a rocket going from right to left just above the horizon at twilight. The higher it goes into the sky the more it is illuminated by the sun, the bottom right portion is tinted red from the sunset just over the horizon. The left side of the trail expands into a teardrop shape as the lower pressures higher in the atmosphere allow the rocket engines to propel gases further in every direction. Below the trail are the silhouettes of several trees, one of which is large enough to block the small gap in the rocket trail due to an engine shut off.
A sketch on lined paper of a dragon with a human arm on the back of its neck. It also has stick legs and little wings and is breathing fire. The dragon's name, Trogdor the Burninator, is inscribed next to its image.
An induction stove and electric oven in a kitchen with a tile backsplash. The knob on the right controls the heating element in the back left.
A 12 foot tall indoor climbing wall made of finished birch plywood with a hexagonal grid of holes waiting for rock climbing holds to be added. It will allow climbers to bypass the stairs.
Text in the image reads, "Your 2026 Word: wolfish". The background is a gradient of teal through white into amber. There is a Merriam-Webster logo in the upper left.
Screenshot of a news article headline that says "CBS frantically tries to stop people from seeing censored '60 Minutes'" above a picture of Kristi Noem, The United States Secretary of Homeland Security, talking to cameras inside of CECOT, the maximum security prison in El Salvador. Behind her is a jail cell with a bunch of Salvadoran gang members with MS-13 tattoos lined up, dishonestly suggesting that the Venezuelan deportees who were sent there are violent gang members. The cell also contains four tiered bare metal bunks crammed full of inmates.
A pelican is standing on a table looming over a woman sitting adjacent. The text overlay says "What you did there, I see it" in all caps.
A man with a beard wearing brown with a cowl of green leaves and a large leaf hat. He is dressed as Alan Parrish from Jumanji. He has a surprised expression on his face. Behind him is a hedge of green leaves.
xkcd comic that reads, "You just won the game. It's okay! You're free!" This is handwritten in black on a white background.
A map showing the estimated travel time from Oceanside to San Clemente as 2 hours and 17 minutes when it would normally be about 30 minutes. The map also shows that the five freeway along Camp Pendleton is shut down due to a Trump ordered military demonstration involving live fire from a naval ship across the freeway into the marine base.
A large crowd of people stretches down the street. They're holding anti-Trump protest signs and waving American flags. Cars are honking and waving as they drive past.
Wide angle shot of noctilucent cloud left from a rocket trail passing in front of the moon and dark blue sky. It starts as a wispy line that curls into a sort of spiraling zigzag.
The cover art for the album "Waiting" by musical artist "Thursday". It is mostly black with a landscape orientation photo in black and white that shows a car sitting in the middle of a snowy scene with a bleak cloudy sky.
A green pair with a mouth full of too many teeth, and no eyes, is saying"LOL WUT". The pair is sitting on a grassy hill with white flowers, in the background there are giraffes and a lighthouse.
A close-up of a figeater beetle clinging to a piece of wood. Its exoskeleton is a shiny iridescent green with a golden brown trim around the border.
A winter sunrise outside of Washington DC. Snow is on the ground and the trees are bare against the pale sky, with orange just above the horizon.
Lineup poster for the 2003 Reading and Leeds Music Festival. The yellow poster has black text naming dozens of bands, including Metallica and Finch.
A child wearing a blue helmet and a Minecraft backpack is riding their bike past trees on their way to school. Another set of bicycle handlebars can be seen in the foreground.
The primary/tertiary mirror for the Vera C. Rubin telescope being polished in an underground facility under the football stadium at the University of Arizona in Tucson. Several signs say LSST since it was called the Large Synoptic Survey Telescope at the time. The mirror blank is about 8 meters across, and the inner, more concave portion is being polished.
A visualization of average annual temperatures using vertical lines that are various shades of blue, white, and red. This chart shows the temperature change for San Diego from 1850 until present day. The last four decades are mostly red while the first century is mostly blue.
A man wearing a black mask and a black shirt that reads "MUNDUS SINE CAESARIBUS" which is Latin for "A world without Caesars". On his shoulders is a child wearing a black mask and a rainbow tie-dye shirt, and holding a U.S. flag.
When asked about Trump helping South African immigrants while deporting immigrants from other countries, Grok mentions the apparent contradiction, the aggressive nature of Trump's policies, the probability that this is all just to send a message, and that it is likely tied to the fact that Elon Musk is from South Africa and is a Trump ally.
Two Bluesky posts in a row, by different users, using "rollicking" as an adjective in unrelated contexts.
Black and white photo of a woman with long hair and glasses standing next to a pile of binders full of computer code printed out on paper that stands as tall as her.
A green dinosaur named Yoshi from the Mario Bros universe.
A crowd of hundreds upon hundreds at a rally for science on the UCSD campus. Many are holding signs.
A large crowd of hundreds upon hundreds at a pro-science rally at UCSD. Many are holding signs.
A woodpecker is perched on the side of a cottonwood tree. The bird has a black back and wings with white horizontal stripes, and a white belly with black horizontal stripes and some speckling. It's head is black and white with some yellow feathers near the beak, and is kept with red feathers on the top and back of the head. The rough bark of the tree is a light brownish gray with lots of small branches and twigs all around the bird. The sky is overcast with a light gray, leaving the bird as the only source of vibrant color.
A massive cavern filled with a variety of stalactites and stalagmites, most of which are far larger than a person. Some are illuminated while others are silhouetted.
An upside down American flag hanging in a window backlit by the setting sun.
An email from Trogdor to HR@OPM.gov with a bullet point list of five things. Item one says, "I was a man." Item two says, "Maybe I was a dragon-man." Item three says, "Maybe I was just a dragon." Item four says, "I was still Trogdor!" Item five says, "I burninated the countryside." The email is signed by Trogdor the Burninator.
A person with a brown beard wearing a blue shirt with the Captain America shield on it. They also are wearing a green hat and jacket.
A hand is holding a copy of the book "Introduction to Water in California" in front of a blue wall. The cover of the book has an image of a mountain stream in the Sierra Nevada range. The author of the book is David Carle.
A high school teacher and two students standing in front of a screen with their research poster on it had an astronomy conference.
The full moon in front of Mars, but you can't see Mars, because the moon is in front of it.
The silhouette of a branch crosses the nearly full moon with a dark sky in the background.