Chien-Shiung Wu is known primarily for one particular experiment, the first experiment to show unequivocally and definitively that the previous assumption that parity was preserved in the weak nuclear force was invalid. However, at that time she had already made many other substantial contributions to nuclear physics and she was recognized as one of the greatest experimental physicists of her time. She had an unparalleled ability to assess the demands of the experiment, as well as the capabilities and limitations of the tools at her disposal. She easily identified possible sources of error, both in her own work and that of others, and used that knowledge in planning the next experimental investigation. When she tested theoretical models by searching for phenomena not yet observed, she was always alert to pitfalls or difficulties that could invalidate the investigation, and she did what was necessary to avoid them. A great scientist whose story began on May 31, 1912.

Stop Asian Hate is a movement against racism, hatred and mistreatment towards the Asian community in the United States has been growing in recent days and has spread through the Internet. Over the past year, harmful rhetoric and attacks on this population have increased, in part, due to the origin of the Covid-19 pandemic.

The Black Lives Matter movement began in 2013 as a hashtag a year after Trayvon Martin’s death in Florida.
Martin, a 17-year-old black man, was killed in 2012 by George Zimmerman, a neighborhood watch captain in Sanford, as he was walking back to the home of his father’s fiancee in Sanford, Florida, after stopping at a store at buy some sandwiches. Zimmerman acknowledged that he shot Martin claiming self-defense, but was acquitted after a media trial.
The movement, whose motto is «Black Lives Matter,» was founded «in response to the acquittal of Trayvon Martin’s killer.»
As the co-founder of the Patrisse Khan-Cullors movement wrote in 2019, the original phrase was written in a letter to the black community by Alicia Garza, a black writer and speaker, who lives in Oakland, California, after Martin’s death. And Khan-Cullors made it a hashtag so that through social media the community could help combat racism against black people around the world.
What started as a social media movement took off after the death of young black Michael Brown in 2014 at the hands of a white policeman. Since then, it grew into an organization that has since expanded not only in the United States, but to Canada and the United Kingdom.
Black Lives Matter’s Mission as an organization is to «eradicate white supremacy» and intervene through local power «in the violence inflicted on black communities by the state and vigilantes.»
The project created by Garza, Khan-Cullors and Opal Tometi – who describe themselves as radical black leaders – has increased its visibility in recent years, but had a new moment of visibility in May 2020 after the death of George Floyd at the hands of a white cop in Minneapolis, who for almost 9 minutes pressed his knee on Floyd’s neck. The responsible officer, Derek Chauvin, was fired and faces charges of involuntary manslaughter and manslaughter.
The movement «helped spark the conversation around police and state violence» against black people, says its website, adding that the movement’s commitment is to «fight together and imagine and create a world free of anti-blackness, where every black person has the social, economic and political power to prosper »
And Floyd’s death sparked mass protests not only in Minneapolis, but in various cities across the United States and around the world calling for more and more to join the initial call: that the lives of black people matter.

Chawla was born in Karnal, India in 1961 the third of four children, and died in the tragedy of the Columbia space shuttle as it was destroyed when entering orbit on February 1, 2003 over the southern United States 16 minutes before the landing. Kalpana Chawla had a certified flight instructor license for single-engine, multi-engine, gliders, seaplanes, and even for instrument control on airplanes.