Before revision:  Using an agent-based model, we show that cells with memory navigating rugged chemoattractant landscapes can enhance their drift speed by extracting information from the correlationsin their environment beyond local gradients. The improvement is maximal when the cellular memory is comparable to the timescale of the fluctuations perceived during swimming.
After revision:  Using an agent-based model, we show that cells with memory navigating rugged chemoattractant landscapes can enhance their drift speed by extracting information from environmental correlations. Maximal advantage is achieved when the memory is comparable to the timescale of the fluctuations perceived during swimming.