We've seen scientists experiment with DNA as a storage medium -- most recently with a Harvard team fitting 704TB of data onto a single gram of the genetic material -- and it looks like that research trend is only picking up.

ENGADGET: Scientists encode Shakespeare sonnets, MP3 and more into glitch-free DNA

Important cases where the computational definition of R2 can yield negative values, depending on the definition used, arise where the predictions which are being compared to the corresponding outcomes have not been derived from a model-fitting procedure using those data, and where linear regression is conducted without including an intercept.

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