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Category: Science

ചിമ്പാന്‍സികള്‍ നമ്മുടെ ആരാണ്? 

ഏകദേശം 50 ലക്ഷം വര്‍ഷങ്ങള്‍ മുന്‍പ് ആഫ്രിക്കയിലെ വരണ്ട പുല്‍മേടുകളില്‍ ജീവിച്ചിരുന്ന ആള്‍ക്കുരങ്ങുകളില്‍ പരിണാമം സംഭവിച്ചു ഒരു ശാഖ ചിമ്പാന്‍സികളിലെക്കും മറ്റൊന്ന് മനുഷ്യന്റെ ദിശയിലേക്കും നീങ്ങി.

ചിമ്പാന്‍സികളിലേക്ക് തിരിഞ്ഞ പരിണാമപാതയില്‍ നിന്നുമാണ് ബൊണോബോ (bonobo) എന്ന ഒരല്പം കുള്ളന്മാരായ ചിമ്പാന്‍സികള്‍ പരിണമിച്ചത്‌. ഇവയെ പിഗ്മി ചിമ്പാന്‍സികളെന്നും വിളിക്കുന്നു. ഏകദേശം 10 ലക്ഷം വര്‍ഷങ്ങള്‍ക്കു മുന്‍പാണ് ബൊണോബോ ചിമ്പാന്‍സികള്‍ ഉണ്ടാകുന്നത്. കോംഗോ നദി രൂപപ്പെട്ടപ്പോള്‍ നദിയുടെ ഇരുഭാഗത്തും പെട്ടുപോയ ചിമ്പാന്‍സികള്‍ അവിടുത്തെ ഭൌതീക സാഹചര്യം അനുസരിച്ച് വ്യത്യസ്തമാകുകയായിരുന്നു.

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Electricity and Electromagnetism – Part 2

 shares Love This0 Facebook0 Twitter0 WhatsApp0 Google+0 Telegram0 Email0 Blogger0 Gmail0 Facebook Messenger0Electricity and Electromagnetism – Part 2 The beginning of electricity’s modern era can be traced to a small Danish classroom in 1820. There, in front of a room full of physics students, Hans Christian Oersted (1777–1851) discovered that electricity can produce magnetic fields. Oersted was the son of a Danish pharmacist, and he had planned to follow his father’s profession, but he became captivated by electrical studies in 1800. He gained great popularity as a science lecturer and was given a professorship at the University of Copenhagen...

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Electricity and Electromagnetism

 shares Love This0 Facebook0 Twitter0 WhatsApp0 Google+0 Telegram0 Email0 Blogger0 Gmail0 Facebook Messenger0Electricity and Electromagnetism Can we even imagine a world without electricity? But as unimaginable it may sound to us now, the story of electricity for practical use has been around for only few centuries. Most modern uses of electricity rely on electrons that move. Newton’s first law of motion demands that electrons can’t move unless a force is applied. A method for applying such a force was discovered in 1794, when the Italian physicist Alessandro Volta (1745–1827) invented the battery. Alessandro Giuseppe Antonio Anastasio Volta was born...

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The First Law Thermodynamics, and the net energy of the Universe

The first law of thermodynamics states energy can’t be newly created nor destroyed; so where did the universe come from? Did the origin of universe require a super natural explanation? New understanding of cosmology however shows, despite our intuitions, the net energy of universe is 0 and the whole universe could indeed come out of the “quantum foam” of nothingness, according to Stephen Hawkins and others. A brief overview of the implications of this dramatic new insight.

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The Nature of Energy Laws of Thermodynamics

The study of energy is called thermodynamics. Unlike Newton’s laws of motion, the laws of thermodynamics did not spring fully formed from one mind. Rather, these ideas emerged gradually from the work of many researchers, and it was only later that they were set down in the form we now know.

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