Neurotree growth.
This chart shows the number of people added to Neurotree each quarter since it was created in January 2005. It's not clear if the annual cycle of slow-Q1 and quick-Q4 growth that showed up in the first few years is persisting. But in any case, it seems we haven't quite run out of neuroscientists yet. Of course, that hasn't stopped us from casting the net wider with trees for other fields. The more general academictree.org effort provides the exciting opportunity to connect genealogies across academia. The early spikes in the other-tree data reflect the addition of big new data sets (Flytree, Q2 2008; Marine Ecology Q4 2009), but more recently growth has been spread over many trees. If your non-neuroscientist friends are jealous of Neurotree, have them contact us to set up a tree of their own.

Neurotree Nodes: Quarterly Growth

1967-

1574-

1180-

787-

393-

Jan 05

Apr 05

Jul 05

Oct 05

Jan 06

Apr 06

Jul 06

Oct 06

Jan 07

Apr 07

Jul 07

Oct 07

Jan 08

Apr 08

Jul 08

Oct 08

Jan 09

Apr 09

Jul 09

Oct 09

Jan 10

Apr 10

Jul 10

Oct 10

Jan 11

Apr 11

Jul 11

Oct 11

Jan 12

Quarter

Neurotree  All other trees

Node vs. connection growth
It's also interesting to compare the rate of growth of nodes vs. connections. So far, they've grown at a similar pace, but as the tree is getting larger, the number of new connections seems to be gradually outpacing the number of new nodes.

Neurotree: Nodes vs. Connections

2690-

2152-

1614-

1076-

538-

Jan 05

Apr 05

Jul 05

Oct 05

Jan 06

Apr 06

Jul 06

Oct 06

Jan 07

Apr 07

Jul 07

Oct 07

Jan 08

Apr 08

Jul 08

Oct 08

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Oct 09

Jan 10

Apr 10

Jul 10

Oct 10

Jan 11

Apr 11

Jul 11

Oct 11

Jan 12

Quarter

New nodes  New connections

Daily growth
A bit more detail about what has been happening during the last month.

Neurotree: Growth during last 30 days
41-
33-
25-
16-
8-
	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	01	02	03
	Day
	Neurotree  All other trees