A team of researchers has discovered specific acoustic characteristics that enhance the enjoyment of birdsong for humans. Among the various bird songs analyzed, blackbirds topped the charts for pleasantness, while barn owls trailed behind. It was found that songs with narrower bandwidth and increased complexity were rated as more enjoyable. Additionally, higher frequencies paired with lower amplitudes significantly influenced pleasantness.

A 2002 study examined 12 artificial reefs built off Miami Beach using limestone boulders, concrete-gravel aggregate and concrete mixed with waste tyre chips. Divers surveyed the reefs every two months from October 1998 to February 2001, recording fish species, numbers and sizes, along with spiny lobsters. They counted 97,826 fish from 146 species. The researchers found no significant difference in fish abundance, biomass or species richness between the three reef materials. However, comparisons before and after deployment showed that the artificial reefs increased local fish abundance and species richness.

New England's creative solution to invasive green crabs involves incorporating them into the local diet and economy. Fishermen now target these soft-shelled crabs, which are gaining popularity and higher prices. Emerging markets for green crab products, including pet snacks and whiskey infusions, aim to counteract the harmful effects of this invasive species while boosting the economy.

A fungus launches infectious spores using pressurized liquid bursts from dead flies. These spores are propelled with significant force, reaching speeds up to ten meters per second. Spore size is crucial, balancing momentum for dispersal and air current transport. Dead female flies attract males, aiding spore spread through contact and movement. This remarkable fungal artillery ensures continued infection and life cycle progression.

Nasa researchers observed freshwater snails reproducing in space during a Shuttle mission. Their gravity-sensing organs, called statoconia, grew substantially larger in microgravity. Swordtail fish larvae also developed enlarged otoliths, which are similar gravity-sensing stones. This indicated a critical developmental period where altered gravity impacts stone size. The findings suggest these organs regulate to achieve a functional weight.

Five geckos flew on a 16-day space mission without food or water. This experiment tested reptiles as models for microgravity research. Laboratory analysis revealed changes in bone density and liver cell activity. Researchers attributed these changes to housing and lack of provisions. Geckos' specialized toe pads helped them adhere in weightlessness.

Nasa launched rhesus monkey Miss Sam in January 1960 to test Project Mercury's escape system. The flight confirmed the escape tower's ability to pull the capsule clear of its booster. Miss Sam reached 1,800 mph and an altitude of nine miles before recovery. Her mission data helped assess the safety of the Mercury spacecraft for human flights. Behavioral and physiological monitoring pioneered on her flight influenced later primate missions.

Researchers created an artificial reef from coal-fired power station waste in Poole Bay. Marine life began colonizing the structure almost immediately after its deployment. Adult lobsters and edible crabs reached the reef within three weeks of its placement. The structure attracted schools of pouting and supported reproduction for several species. This experiment showed industrial waste could become a productive marine habitat.

Swiss engineers have developed miniature robots that fly and steer without motors. These devices harness sound waves through Helmholtz resonance to generate directional thrust. Researchers demonstrated this principle by steering tiny boats and lifting microfliers off the ground. One microflier design used three microscopic cavities for direct vertical thrust. Another version spun tiny blades, generating helicopter-like lift at high speeds.

A groundbreaking 17-year study on Lake 223 in Ontario revealed a complex response to acid rain. While the water chemistry has recovered since the experiment ended, the ecosystem is lagging behind. Fish numbers have not rebounded as hoped, with growth rates remaining low. This underscores the vital message that true ecological healing involves much more than merely restoring chemical balance.

Researchers have identified a piezoelectric effect in ultrathin diamond membranes. This effect, previously unseen in bulk diamond, appears in thin polycrystalline sheets. Grain boundaries within these membranes are responsible for generating electrical responses when deformed. The strongest piezoelectric response was observed in membranes approximately five micrometres thick. This discovery opens doors for new applications in energy harvesting and smart electronics.

Scientists mapped enormous lava flow fields on an underwater volcano. These flows are significantly larger than any previously recorded eruptions. Molten rock pooled beneath a hardened crust, swelling to extraordinary thickness. This process reshaped the ocean floor and offers clues about caldera collapse. Researchers estimate the next major caldera-forming eruption may occur thousands of years from now.