How do scientists know that the hominid called ardi is about 4.4 million years old?

Scientists use absolute and relative dating. Absolute dating is finding the age of something. While relative dating is when scientist determine the order of certain past events. (like with rock layers)

I hope this helps you in someway!! :)

-Cherry

acts of terrorism occur globally. the united nations global counter-terrorism strategy was created in order to build adequate systems of support and solidarity with victims of terrorism. here´s a summary of the proposed key themes: the importance of giving victims a face and a voice; protecting their dignity; giving victims legal status and defending their legal rights; providing victims with medical, psycho-social and financial support; building solidarity with victims; improving media coverage of victims; and focusing on the link between victims and counter-terrorism efforts more generally.