The Arcane Kids, a video game collective from Los Angeles, have a manifesto that I think about all the time, but particularly when I find art that surprises me, or approaches traditional formats in new and exciting ways. The second line simply states: "The fastest way to the truth is a joke." Another Crab's Treasure, the second offering from indie Australian studio Aggro Crab, is full of truth and jokes – and something else, something rarer, too. Another Crab's Treasure is ostensibly a combat-oriented adventure game, in which you play a tiny hermit crab whose shell has been stolen. You must explore the depths of the ocean to find a way to retrieve it from the Loan Shark, so you can return the wee crab to his peaceful life in the tide pools on the shore.

This paper introduces two randomized preconditioning techniques for robustly solving kernel ridge regression (KRR) problems with a medium to large number of data points ($10^4 \leq N \leq 10^7$). The first method, RPCholesky preconditioning, is capable of accurately solving the full-data KRR problem in $O(N^2)$ arithmetic operations, assuming sufficiently rapid polynomial decay of the kernel matrix eigenvalues. The second method, KRILL preconditioning, offers an accurate solution to a restricted version of the KRR problem involving $k \ll N$ selected data centers at a cost of $O((N + k^2) k \log k)$ operations. The proposed methods solve a broad range of KRR problems and overcome the failure modes of previous KRR preconditioners, making them ideal for practical applications.

The RoboKrill robot has appendages (right) that move like krill's swimming legs through water A robotic leg moving through water creates similar patterns to the motion of krill as they swim, and could be used to study the role these animals play in their marine environment. Krill are small crustaceans that serve as one of the most important and largest ocean food sources.

Blue whales swim to the surface to feed on krill as it helps them to conserve energy, according to a new study that involved amazing drone footage of the mammals. Experts from Oregon State University found that feeding on the ocean's surface plays an important role in the hunt for food among New Zealand blue whales. Blue whales are the largest mammals on Earth and have to carefully balance the cost of energy they get from food with the cost of energy used in getting the food. Researchers say the marine mammals forage for krill in areas where they are densely packed and found near the surface of the water to cut their dive time. The Oregon team found that the blue whales do this to conserve on the energetic costs of feeding such as diving, holding their breath or opening their mouths.

In today's game industry, titles like "Clash Royale" and "Pokemon Go" are free for most people to enjoy because there's a small number of players who pay for extras, like special weapons or more lives. Game developers have to strike a delicate balance in this free-to-play model between drawing the masses and encouraging big spenders -- and they need both for a successful title. Silicon Studio Corp. is trying to help by providing game makers with deep-learning algorithms to create what amounts to a psychological profile of each player. The Tokyo-based company's software predicts how long people will play, what levels they might achieve, how much money they might spend and on what. Even more important, the technology lets game creators mold player behavior to keep them hooked.

To see the world through the eyes of a 40-ton polar whale it helps to use a little bug. At least that's what this satellite tracking tag resembles. We're crammed into an inflatable black rubber zodiac on a blustery day in Antarctica's Gerlache Strait, puttering toward a motionless humpback whale. A fist-sized camera with gangly grasshopper-like antennae and suction cup feet sits on a pole resting on scientist Ari Friedlaender's shoulders. Towering icebergs and glacier-draped mountains rise around us.

Researchers used a drone to capture rare aerial images of blue whale's feeding. Blue whales, the largest creature on Earth, get their energy by consuming krill - some of the smallest animals on Earth. With the drone, the researchers were able to gain an aerial perspective of a blue whale on its side, lunging to eat a large plume of krill in one big bite. In the video taken in New Zealand, the whale sees that there is a large krill patch in the water. Dr Leigh Torres, Assistant Professor at Oregon State University's Marine Mammal Institute, said that the behavior'is something we often see from the boat, and we see splashing and we can tell the animal turns on its side but - but with the drone we were able to get this remarkable new perspective'.

The expedition in the Southern Ocean found that stocks of krill under the ice were five times more concentrated than those in open waters. The shrimp-like species is a key food for penguins, whales and fish. The importance of sea ice as a nursery for krill has long been suspected. However, these findings are the first large-scale measurements of the breeding ground's existence. The discovery was made by UK scientists from the British Antarctic Survey, the Open University and the Marine Laboratory, Aberdeen.