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Movements, leaders, victories and the continuing fight for equality.
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Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
Wilmington, North Carolina once had a thriving Black middle class and an elected interracial government. In 1898 white supremacists used violence to overthrow that government, kill Black residents and drive many others from the city.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
 | |
| Company type | Private |
|---|---|
Website type | Educational technology |
| Available in | Hindi, English, Spanish, Portuguese (BR), French, Filipino (Tagalog), Turkish, Romanian, Russian, Polish, Italian, Indonesian, Ukrainian |
| Founded | September 2009 |
| Headquarters | New York City, United States Kraków, Poland |
| Area served | United States, India, Poland, Brazil, Indonesia, Latin America, Spain, Portugal, France, Romania, Ukraine, Philippines |
| Creators | Michał Borkowski Tomasz Kraus Łukasz Haluch |
| Key people | Michał Borkowski (President of the Management Board) |
| Industry | Education |
| Website | https://brainly.com/ https://brainly.pl/ |
| Users | 15 million daily active users (2024)[1] |
| Brainly | |
|---|---|
| Stable release | For iOS:- Version 4.192.0 (October 21, 2025)
For Android:- Version 5.269.0 (October 20, 2025) |
| Operating system | iOS, Android |
| Size | 51 MB (Android) |
| Website | iOS Android |
| As of | February 2022 |
Brainly is an education technology company founded in Kraków, Poland and headquartered in New York City.
The company was founded in 2009 in Poland by Michał Borkowski (the current chief executive officer),[2] Tomasz Kraus, and Łukasz Haluch.[3] Initially starting as a peer-to-peer platform where students can ask questions and answer them for other students,[4] Brainly has since repositioned as an AI-based learning platform for homework help, test prep, and tutoring.[5]
In January 2011, the company founded Znanija.com, a Russian language version of the platform.[6]
In June 2016, Brainly acquired the US-based OpenStudy.[7][8]
In January 2018, Brainly announced the acquisition of the video education start-up Bask to incorporate video features into its platform.[9]
In 2020, the company saw a significant increase in its number of users, attributed to the global COVID-19 pandemic, from 150 million in 2019 to approximately 350 million in 2020.[10][11]
In 2020, numerous users on the Art of Problem Solving website found that Brainly had compromised the integrity of the American Mathematics Competitions after posting the questions on its website along with the correct answers. This led to Brainly updating its honor code.
As of 2020, the company had raised approximately $150 million in funding from investors.[11]
In 2023, Brainly implemented artificial intelligence (AI) features for the platform.[12]
In 2024, Brainly released Test Prep, a tool that generates practice questions for exams.[13]
In 2025, Brainly evolved from a community-led platform into a comprehensive AI Learning Companion, introducing agentic AI support for homework help, tutoring, test preparation, and active classroom participation in the US. Other countries remained community-led.[14]
ToS;DR (Terms of Service; Didn't Read), a project which analyzes terms of services (ToS) and privacy policies of websites, ranks Brainly at grade D.[15]
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
Brainly is an education technology company founded in Kraków, Poland and headquartered in New York City.
Runa Capital is an international venture capital firm headquartered in Luxembourg that invests in deep tech, enterprise software, and fintech infractructure early-stage startups. From 2010 through 2022, Runa Capital raised around $500 million in 4 funds and invested in over 100 companies in more than 14 countries of Europe and North America, including Nginx, MariaDB, Zopa, Brainly, drchrono, Smava, Brainly and Mambu.
The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It consists of nervous tissue and is typically located in the head (cephalization), usually near organs for special senses such as vision, hearing, and olfaction. Being the most specialized organ, it is responsible for receiving information from the sensory nervous system, processing that information (thought, cognition, and intelligence) and the coordination of motor control (muscle activity) and the endocrine system. While invertebrate brains arise from paired segmental ganglia (each of which is only responsible for the respective body segment) of the ventral nerve cord, vertebrate brains develop axially from the midline dorsal nerve cord as a vesicular enlargement at the rostral end of the neural tube, with centralized control over all body segments. All vertebrate brains can be embryonically divided into three parts: the forebrain (prosencephalon, subdivided into telencephalon and diencephalon), midbrain (mesencephalon) and hindbrain (rhombencephalon, subdivided into metencephalon and myelencephalon). The spinal cord, which directly coordinates somatic functions below the head, can be considered a caudal extension of the myelencephalon enclosed inside the vertebral column. Together, the brain and spinal cord constitute the central nervous system in all vertebrates. In humans, the cerebral cortex contains approximately 14–16 billion neurons, and the estimated number of neurons in the cerebellum is 55–70 billion. Each neuron is connected by synapses to several thousand other neurons, typically communicating with one another via cytoplasmic processes known as dendrites and axons. Axons are usually myelinated and carry trains of rapid micro-electric signal pulses called action potentials to target specific recipient cells in other areas of the brain or distant parts of the body. The prefrontal cortex, which controls executive functions, is particularly well developed in humans. Physiologically, brains exert centralized control over a body's other organs. They act on the rest of the body both by generating patterns of muscle activity and by driving the secretion of chemicals called hormones. This centralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness such as reflexes can be mediated by the spinal cord or peripheral ganglia, but sophisticated purposeful control of behavior based on complex sensory input requires the information-integrating capabilities of a centralized brain. The operations of individual brain cells are now understood in considerable detail but the way they cooperate in ensembles of millions is yet to be solved. Recent models in modern neuroscience treat the brain as a biological computer, very different in mechanism from a digital computer, but similar in the sense that it acquires information from the surrounding world, stores it, and processes it in a variety of ways. This article compares the properties of brains across the entire range of animal species, with the greatest attention to vertebrates. It deals with the human brain insofar as it shares the properties of other brains. The ways in which the human brain differs from other brains are covered in the human brain article. Several topics that might be covered here are instead covered there because much more can be said about them in a human context. The most important that are covered in the human brain article are brain disease and the effects of brain damage.
A brain tumor (sometimes referred to as brain cancer) which occurs when a group of cells within the brain grow out of control, creating a mass. There are two main types of tumors: malignant (cancerous) tumors and benign (non-cancerous) tumors. These can be further classified as primary tumors, which start within the brain, and secondary tumors, which most commonly have spread from tumors located outside the brain, known as brain metastasis tumors. All types of brain tumors may produce symptoms that vary depending on the size of the tumor and the part of the brain that is involved. Where symptoms exist, they may include headaches, seizures, problems with vision, vomiting and mental changes. Other symptoms may include difficulty walking, speaking, with sensations, or unconsciousness. The cause of most brain tumors is unknown, though up to 4% of brain cancers may be caused by CT scan radiation. Uncommon risk factors include exposure to vinyl chloride, Epstein–Barr virus, ionizing radiation, and inherited syndromes such as neurofibromatosis, tuberous sclerosis, and von Hippel-Lindau Disease. Studies on mobile phone exposure have not shown a clear risk. The most common types of primary tumors in adults are meningiomas (usually benign) and astrocytomas such as glioblastomas. In children, the most common type is a malignant medulloblastoma. Diagnosis is usually by medical examination along with computed tomography (CT) or magnetic resonance imaging (MRI). The result is then often confirmed by a biopsy. Based on the findings, the tumors are divided into different grades of severity. Treatment may include some combination of surgery, radiation therapy and chemotherapy. If seizures occur, anticonvulsant medication may be needed. Dexamethasone and furosemide are medications that may be used to decrease swelling around the tumor. Some tumors grow gradually, requiring only monitoring and possibly needing no further intervention. Treatments that use a person's immune system are being studied. Outcomes for malignant tumors vary considerably depending on the type of tumor and how far it has spread at diagnosis. Although benign tumors only grow in one area, they may still be life-threatening depending on their size and location. Malignant glioblastomas usually have very poor outcomes, while benign meningiomas usually have good outcomes. The average five-year survival rate for all (malignant) brain cancers in the United States is 33%. Secondary, or metastatic, brain tumors are about four times as common as primary brain tumors, with about half of metastases coming from lung cancer. Primary brain tumors occur in around 250,000 people a year globally, and make up less than 2% of cancers. In children younger than 15, brain tumors are second only to acute lymphoblastic leukemia as the most common form of cancer. In New South Wales, Australia in 2005, the average lifetime economic cost of a case of brain cancer was AU$1.9 million, the greatest of any type of cancer.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Shirley Chisholm, elected in 1968.