Heads up, everyone. Our developers have requested a brief downtime (approximately 10-15 minutes) to implement some changes, starting at 8PM Pacific time tonight (Tuesday). Here are some things you’ll likely notice once this is done:

You should receive emails about your progress now (be sure you have opted in!)
More challenges should fit without scrolling in the front page.
We fixed some minor annoyances when changing personal settings.

Needless to say, if these things don't work as intended you'll want to head over to our forums (click community up top) and let us know right away.
We only expect this outage to be brief, but in the event of problems we could be out for about an hour. In the event of extended issues that go longer than that, please do check in with us at Facebook and/or Twitter for updates before emailing us.

Thanks for your patience and understanding!

As part of our newest set of challenges we have our first neuron from the Frontal Cortex. It has a complex axon and in addition to some bright spots that are not part of the neuron. Be extra careful when tracing to avoid including these noisy parts.

Hi everyone - great work on these recent challenges: they’re just about done! Mouse V1-20 and V1-21 will be taken back to our scientists today at 5pm Pacific time, and ALM-12 will be taken down tomorrow (Tuesday) at 5pm. Look for new challenges at that time.

Replacing Mouse-ALM-10, we have this fresh new challenge. Of note, our scientists will be comparing this against a gold standard, so we’re eager to find out how you do!