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1. Community
2. Content Requests and Feedback
3. Can you add a course on hacking?

Companies use Red, Green (not really), and White hat hackers to prevent cyber attacks and can actually get into contact with the bad hackers.

1. Community
2. General Khan Academy Questions
3. "Retired" Speed badges?

Hi Richard, You are correct that the Sub-Light Speed and 299, 792, 458 Meters per Second were recently retired. I don't know if they will be returned though.   

1. Community
2. General Khan Academy Questions
3. Black Hole Badges

Quite a few people have more than 100 billion energy points

1. Community
2. General Khan Academy Questions
3. Points

Energy Points are the measure of effort on Khan Academy. As you earn more, you'll unlock badges, avatars, and backgrounds. Right now, there is no feature for users to be able to spend EP's on anyth...

1. Community
2. Feature Requests and General Site Feedback
3. Make the site more engaging and improve the project search

Hi Brooklyn, Those are great ideas! I do assume that the staff at Khan Academy are working very hard on things and I do know that they take everyone's suggestions. Some of these ideas were previous...

1. Community
2. Technical Issues and Workarounds
3. My consecutive days streak ended

Yes, KA is not about maintaining a streak, but rather, learning.

1. Community
2. General Khan Academy Questions
3. Does completing a course grant a Mastery badge for the course?

But, they may (or may not) return sometime in the future as we move from our current code base.

1. Community
2. General Khan Academy Questions
3. How do I search for a exact project on Khan Academy?

You could search it up in the search bar next to courses. I tried it and I found a project for 2048, though you have to go to that user’s profile and click on the project, it’s pretty simple. Hope ...

1. Community
2. News and Updates from Khan Academy
3. Update: New point badges!

Hi Mark, Many badges were recently removed, this includes the Ramanujan sun badge also. This is due to KA moving from their current codebase (which is also being retired) to a new one, and carrying...

1. Community
2. General Khan Academy Questions
3. Some theories on the retired badges.

Yep, as KA keeps growing in its community and learning aspects, it would be due time to move on from old things. New badges (likely) would be introduced.