In spite of many attempts to replace it with a more suitable material, asphalt concrete remains the best and cheapest material for paving roads. Vulnerable to heat, ice, ultraviolet light and mechanical stress, it has a relatively short lifespan and has to be repaired or replaced at regular intervals. Swiss engineers say they may have found a formula for asphalt with self-healing properties VOA’s George Putic reports.
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Day: August 26, 2017
A new device, developed by an Israeli start-up, could make routine visits to the doctor’s office a thing of the past. Faith Lapidus reports.
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The Olive Ridley Sea Turtle is classified as vulnerable by the International Union for Conservation of Nature, the IUCN. Threats come on land and sea. Thousands of turtles die every year in fishing nets, and their eggs are considered a delicacy. But on one protected beach in Mexico, the Olive Ridley turtles are swarming. VOA’s Kevin Enochs reports.
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Reports of cyberattacks against companies and governments around the world seem to be appearing in the headlines more frequently this year. Cyber security experts explain why the risk of being hacked is now greater, who is doing the hacking and what can be done to prevent or minimize the damage. VOA’s Elizabeth Lee has the details.
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