Okazuje się, że świat po drugiej stronie lustra z opowieści Lewisa Carrolla o Alicji istnieje naprawdę – odkryli go i opisali fizycy. Jak do niego trafić?

Rosyjska sonda Fobos-Grunt rozpocznie w listopadzie 2011 roku podróż w kierunku Marsa. Na jej pokładzie znajdzie się wyprodukowany w Centrum Badań Kosmicznych PAN unikatowy penetrator geologiczny CHOMIK. Jego zadaniem będzie pobranie próbek większego z marsjańskich księżyców - Fobosa.

Do niedawna uważano ptaki za wyjątkowo wierne. Dziś wiemy, że wśród większości socjalnie monogamicznych ptaków częstym zjawiskiem są skoki w bok. Po co ptakom związki pozapartnerskie?

Nieuświadomionym zagrożeniem dla naszego zdrowia na obszarach pogórniczych są podziemne pożary. Czy możemy je rozpoznawać zawczasu i się przed nimi chronić?

Powielanie kwasu nukleinowego (RNA lub DNA) ma kluczowe znaczenie dla komórki. Z procesem tym, który musi być niezwykle precyzyjny, doskonale radzą sobie polimerazy. Dzięki specyficznej budowie potrafią zbudować nową nić na podstawie jednoniciowej matrycy.

W opuszczonym kamieniołomie koło Chełma znaleziono ślady kosmicznego kataklizmu, który zakończył erę dinozaurów. Choć było to spodziewane odkrycie, nie wszystko pasuje do powszechnie przyjmowanego scenariusza.

Efforts to stimulate creativity have been found to successfully aid individuals undergoing resocialization, and various forms of art therapy are now being increasingly practiced - even in seemingly unlikely places. One such case is the "prison theatre" movement.

In former coal-mining areas, unseen underground fires can pose a significant danger to people’s health. Careful observation of changes in plant cover can offer an important early warning of such threats.

Accurate replication of nucleic acids (RNA and DNA) is a key process for cells. This intricate, precise job is handled by polymerases, whose specific structure allows them to build new nucleic acid strands using a single-strand matrix.

Birds were until recently considered to be very faithful animals, but now we know that "extramarital" affairs are common among most socially monogamous species. What motivates birds to cheat?

It turns out that the magical world behind the looking-glass portrayed in Lewis Carroll’s novel about Alice is real – it has been discovered and described by physicists. So how do we find a way in?

The Fobos-Grunt probe (its Russian name meaning "Phobos-Soil") will begin its journey toward Mars in November 2011, carrying the unique geological penetrator CHOMIK developed at the Space Research Centre, PAS. Its task will be to collect sample from the larger of Mars' two moons - Phobos.

The Bulletin of the Polish Academy of Sciences: Technical Sciences (Bull.Pol. Ac.: Tech.) is published bimonthly by the Division IV Engineering Sciences of the Polish Academy of Sciences, since the beginning of the existence of the PAS in 1952. The journal is peer‐reviewed and is published both in printed and electronic form. It is established for the publication of original high quality papers from multidisciplinary Engineering sciences with the following topics preferred: Artificial and Computational Intelligence, Biomedical Engineering and Biotechnology, Civil Engineering, Control, Informatics and Robotics, Electronics, Telecommunication and Optoelectronics, Mechanical and Aeronautical Engineering, Thermodynamics, Material Science and Nanotechnology, Power Systems and Power Electronics.

Journal Metrics: JCR Impact Factor 2018: 1.361, 5 Year Impact Factor: 1.323, SCImago Journal Rank (SJR) 2017: 0.319, Source Normalized Impact per Paper (SNIP) 2017: 1.005, CiteScore 2017: 1.27, The Polish Ministry of Science and Higher Education 2017: 25 points.

Abbreviations/Acronym: Journal citation: Bull. Pol. Ac.: Tech., ISO: Bull. Pol. Acad. Sci.-Tech. Sci., JCR Abbrev: B POL ACAD SCI-TECH Acronym in the Editorial System: BPASTS.

Antarctica's "oases" differ from the continent's ice-covered desert in terms of their climate, rocky landscape, and the presence of numerous lakes, shallow reservoirs, and streams that appear briefly in the summer. These oases vary in age from around 5,000 to around 15,000 years old and their development is linked to the glacial retreat.

Fluid motions are responsible for most of the transport and mixing that take place in the environment, in industrial processes and vehicles, and within living organisms.