One fascinating, as well as disconcerting fact about the evolution of Greek thought about science is that, almost immediately after the end of the ‘Classical’ period of philosophy, and particularly after Aristotle’s founding work on both philosophy and science, these two activities seemed to follow two radically separate courses. Actually, Greek science achieved its peak […]
Artefacts hint at complex culture 105K years ago Archaeologists have found a cache of artefacts in the Kalahari Desert including a set of crystals that appeared to have been part of a collection with no practical purpose, suggesting the beginnings of a complex culture. Other artefacts included items that may have been used for water […]
Transition metal dichalcogenides (TMDs) are layered compounds which can be thinned down to the single-layer limit. While mechanical exfoliation generates atomically thin TMD flakes possessing an area of a few square microns, chemical and physical methods provide high-quality monolayers on large-area substrates, which are suitable for actual technological applications. Similar to other two-dimensional materials, TMD […]
Even if we firmly go down the path of the low-carbon economy, the energy transition to renewables is only just beginning. We live now in a world that is still very much fossil fuel-based and the landscape of a fully renewable-powered future has not yet been shaped (and we might have to wait a few […]
When Cern’s gargantuan accelerator, the Large Hadron Collider (LHC), fired up ten years ago, hopes abounded that new particles would soon be discovered that could help us unravel physics’ deepest mysteries. Dark matter, microscopic black holes and hidden dimensions were just some of the possibilities. But aside from the spectacular discovery of the Higgs boson […]
Trio of atomic clocks compared Light frequencies of three different atomic clocks have been compared, moving physicists a step closer to making the measurement of a unit of time — the second — more precise. One clock is made of ytterbium atoms, another of strontium atoms and the last is made of just one aluminum […]
When you first study electromagnetism, all the electromagnetic waves you find are plane ones, waves in which the electric and magnetic fields are both orthogonal to the direction of travel of the wave. But this is a mode – the field pattern of the propagating wave – that is somehow ideal, as it exists in […]
Quick simulations of space orbits and trajectories are essential in different aspects of space engineering, from the optimization of trajectories and orbit transfers, to the determination of the orbits themselves, altitude control, and gravitational modelling. Although the preliminary analysis of satellite space orbits can be done without extensive simulations, to represent the dynamical states of […]
Imagine running on a cement footpath, and then suddenly through dry sand. Just to keep upright, you would have to slow down and change the way you run. In the same way, a walking robot would have to change its gait to handle different surfaces. Generally, we humans and most robots can only change how […]
Oumuamua may be hunk of nitrogen-rich planet The interstellar object Oumuamua is likely a piece of a planet rich in nitrogen that broke off about 500 million years ago and is shaped more like a cookie than a cigar. Researchers used computer models focusing on Oumuamua’s shape, size and shininess to determine the object’s possible […]