Galaxy outskirts likely hunting grounds for dying massive stars and black holes

Findings study provide further evidence that the outskirts of spiral galaxies host massive black holes. These overlooked regions are new places to observe gravitational waves created when the massive bodies collide, the authors report.

The study winds back time on massive black holes by analyzing their visible precursors -- supernovae with collapsing cores. The slow decay of these massive stars creates bright signatures in the electromagnetic spectrum before stellar evolution ends in black holes, according to Science Daily.

Black holes DON'T have a ring of fire, new study suggests: Scientists say they instead may act like a giant 'fuzzball'

 A new study is challenging the idea that black holes are surrounded by ring of fire that incinerates anything in their path, according to Daily Mail.

According to new calculations, black holes may act more like balls of string, meaning they accumulate more and more ‘fuzz’ as objects are pulled in.

The scientists say this means the fuzzy surface would extend to meet the object well before it reaches the hottest part of the black hole.

Acidic oceans cause fish to lose their sense of smell

When carbon dioxide is absorbed by seawater carbonic acid is formed, making the water more acidic. Oceanic CO2 has risen by 43% and is predicted to be two and a half times current levels by the end of this century, according to Science Daily.

Fish use their sense of smell (olfaction) to find food, safe habitats, avoid predators, recognize each other and find suitable spawning grounds. A reduction in their ability to smell therefore can compromise these essential functions for their survival.

The new study provides evidence that economically important species will be affected by elevated CO2, leaving fish vulnerable because it affects their ability to detect odours.

Arctic wild goose chase threatens chicks as temperatures rise

Rising temperatures in the Arctic are encouraging Barnacle geese to speed up their migration journeys north every spring, says a new study.

But their efforts to go faster are leaving them too drained to lay their eggs early when they arrive, according to BBC.

This is bad news for the species as their chicks are hatched too late to take advantage of the best food, so fewer are surviving.

The scientists involved say the birds will have to adapt and migrate earlier.

We may have less control over our thoughts than previously assumed

Think you're totally in control of your thoughts? Maybe not as much as you think, according to a new San Francisco State University study that examines how thoughts that lead to actions enter our consciousness.

While we can "decide" to think about certain things, other information -- including activities we have learned like counting -- can enter our subconscious and cause us to think about something else, whether we want to or not. Psychologists call these dispositions "sets," explains Professor of Psychology Ezequiel Morsella, one of four authors on a new study that examines how sets influence what we end up thinking about, according to Science Daily.