Our Interplanetary Bodies

Improving Our Bodies, Our Meals, and Our Gadgets

Do we own our bodies?

How Bacteria in Our Bodies Protect Our Health

Biologists once thought that human beings were physiological islands, entirely capable of regulating their own internal workings. Our bodies made all the enzymes needed for breaking down food and using its nutrients to power and repair our tissues and organs. Signals from our own tissues dictated body states such as hunger or satiety. The specialized cells of our immune system taught themselves...

Your body, my body, our coupling moves our bodies

Guillaume Dumas*, Julien Laroche and Alexandre Lehmann 1 Institut Pasteur, Human Genetics and Cognitive Functions Unit, Paris, France 2 CNRS UMR3571 Genes, Synapses and Cognition, Institut Pasteur, Paris, France 3 Human Genetics and Cognitive Functions, University Paris Diderot, Sorbonne Paris Cité, Paris, France 4 Akoustic Arts, Paris, France 5 Department of Otolaryngology Head and Neck Surger...

Migration of interplanetary dust.

We numerically investigate the migration of dust particles with initial orbits close to those of the numbered asteroids, observed trans-Neptunian objects, and comet Encke. The fraction of silicate asteroidal particles that collided with the Earth during their lifetime varied from 11% for 100 micron particles to 0.008% for 1 micron particles. Almost all asteroidal particles with diameter d >/= 4...